Histo Test #2
a) the thymus has afferent lymphatics
All of the following are correct except: a) the thymus has afferent lymphatics b) the spleen contains both B and T cells c) lymph nodes contain medullary cords consisting of B cells and plasma cells d) the palatine tonsils are covered by stratified squamous epithelium e) the central vein of the spleen is surrounded by lymphocytes
c) there is a well defined muscularis mucosae
All of the following are true concerning the gall bladder except: a) the mucosal epithelium is simple columnar with goblet cells b) the mucosa may have blind pockets called diverticula or crypts c) there is a well defined muscularis mucosae d) there is no submucosa e) the muscularis externa is thin and appears interwoven
a) the portal space is the area on the liver surface devoid of capsule (of Glisson)
All of the following are true concerning the liver except: a) the portal space is the area on the liver surface devoid of capsule (of Glisson) b) bile production is associated with the exocrine function c) glycogen, albumin, fibrinogen are examples of endocrine function d) glycogen and triglycerides are stored in the hepatocytes e) the liver has considerable regenerative capacity, up to 75% in some animals
c) there are two palatine tonsils, two pharyngeal tonsils and two lingual tonsils
All of the following are true except: a) the pharyngeal tonsil has pleats instead of crypts and is covered by respiratory epithelium b) the lingual tonsils each have a single crypt and they are smaller than the pharyngeal tonsil c) there are two palatine tonsils, two pharyngeal tonsils and two lingual tonsils d) one function of the spleen is to clear old RBC's and pathogens from the blood e) one function of the spleen is to produce RBC's during embryonic development
d) Meissner's corpuscle
All of the following epithelial derivatives except: a) sweat glands b) sweat gland ducts c) sebaceous glands d) Meissner's corpuscle e) hair follicle
c) there is no visible basement membrane because gas exchange occurs here
All of the following statements concerning respiratory epithelium are true EXCEPT: a) approximately 30% of the cells are columnar b) approximately 30% of the cells are stem cells c) there is no visible basement membrane because gas exchange occurs here d) together serous, brush and DNES cells in total constitute approximately 10% of the cells e) cilia are a prominent feature of this epithelium
d) it synthesizes elastin
All of the following statements for endothelium are true except: a) it produces Weibel-Palade bodies (factor VIII) b) it converts angiotensin I to angiontensin II, primarily in the lung c) it is anti-thrombogenic d) it synthesizes elastin e) it forms occluding junctions with neighboring endothelial cells
c) 3, 1, 2, 4
Arrange the following in the correct sequence for impulse conduction in the heart. 1=AV node 2= AV bundle 3= SA node 4= left or right bundle branch a) 1, 2, 3, 4 b) 2, 3, 1, 4 c) 3, 1, 2, 4 d) 3, 2, 1, 4 e) 4, 3, 2, 1
d) submandibular gland
Based on secretion characteristics, the following is the best example of a mixed gland: a) parotid gland b) glands of Littre c) von Ebner's gland d) submandibular gland e) the thuymus
b) straight arteries in the stratum basale
Blood that supplies the nutrients to rebuild the endometrium after menstruation is contained in: a) coiled arteries in the zona spongiosa b) straight arteries in the stratum basale c) straight arteries in the stratum functionale d) coiled arteries in the zona impacta e) all of the above
d) post-capillary venules in the cortex of the lymph nodes
Blood-borne lymphocytes can enter lymph nodes by leaving the blood vascular circulation, that is, by diapedesing through the walls of: a) affarent lymphatic vessels b) subcapsular sinuses of the thymus c) central arteries of the splenic red pulp d) post-capillary venules in the cortex of the lymph nodes e) paracortical sinuses of lymph nodes
b) zona fasciculata c) zona reticularis it had both of these keyed as correct
Cells in the adrenal gland which synthesize and secrete glucocorticoid (cortisol or hydrocortisone) are located in the: a) zona glomerulosa b) zona fasciculata c) zona reticularis d) medulla of the adrenal gland e) B and D are correct
c) disappearance of the theca interna
Changes in structure accompanying follicle development include all of the following except: a) increased size of the atrium b) increased size of the follicle c) disappearance of the theca interna d) increased number of follicle (granulosa) cells e) appearance of the zona pellucida
d) epithelial reticular cells are a prominent feature of the thymus
Choose the best answer. a) the thymus is derived from ectoderm. b) B cells are always found in the thymus c) the thymus of an adult is larger than that of a child d) epithelial reticular cells are a prominent feature of the thymus e) 98% of T-cells die in the thymus medulla
b) the most important antibody for the secondary immune response is IgG
Choose the correct statement. a) the first antibody to appear in serum during the primary immune response is IgD b) the most important antibody for the secondary immune response is IgG c) IL4 is produced by T-helper cells and promotes proliferation of cytotoxic T cells d) plasma cells are long-lived and the source of memory for the immune response e) B cells have cell surface proteins called the T cell receptors that interact with T cells
c) mesangial cell
Clearing (maintenance) of the urinary space and associated basement membrane is done by the: a) podocyte b) proximal tubule brush border c) mesangial cell d) macula densa e) capillary endothelial cell
c) paracrine
Concerning hormones, which of the following is the appropriate term used for the situation where a hormone secreted by a given cell has an affect on an adjacent target cell? a) autocrine b) endocrine c) paracrine d) exocrine e) epicrine
b) endocrine
Concerning hormones, which of the following is the appropriate term used for the situation where a hormone secreted by a given cell into the blood vascular system has an effect on a distant target cell? a) autocrine b) endocrine c) paracrine d) exocrine e) epicrine
b) sublingual glands contain no mucous alveoli
Concerning major salivary glands, all of the following are correct except: a) parotid glands have striated ducts b) sublingual glands contain no mucous alveoli c) submandibular glands have intercalated ducts d) submandibular glands have mucous acini with serous demilunes e) parotid glands are composed of serous acini
e) most primary oocytes are lost through a degenerative process called atresia
Concerning ovaries: a) removal of one ovary results in reduction of approximately 50% in the number of follicles which ovulate b) the ovary of a 20-year-old woman would contain significantly more secondary oocytes than that of a child c) if it were possible to examine ovaries, one could tell if twins were "identical" or "fraternal" d) they contain a medullary region where ovarian follicles containing oocytes predominate e) most primary oocytes are lost through a degenerative process called atresia
b) its outermost parenchyma is the zona glomerulosa which secretes mineralocorticoids (aldosterone)
Concerning the adrenal gland, a) its cortex and medulla originate from the same embryonic germ layer b) its outermost parenchyma is the zona glomerulosa which secretes mineralocorticoids (aldosterone) c) the innermost cortical layer is the zona fasciculata which secretes large amounts of estrogen d) it has an abundant fibrous stroma which divides the organ into lobules e) the function of the medulla is not known
e) all of the above are true
Concerning the menstrual cycle: a) the Fallopian tubes, uterus and vagina undergo cyclic changes b) cycle lengths of 23-35 days are not considered abnormal c) although cycles vary in length, ovulation occurs about 14 days after menstruation begins d) the secretory phase of the uterine cycle is under control of progesterone e) all of the above are true
e) alveoli
Constriction of airways which contain smooth muscle in their walls is clinically important to the physician and to the dentist. Smooth muscle is present in the walls of the broncho-pulmonary tree as far down as the: a) bronchus b) terminal bronchioles c) respiratory bronchioles d) bronchioles e) alveoli
b) CD8
Cytotoxic T cells are most likely to express which of the following cell surface markers? a) CD4 b) CD8 c) CD40 d) CD50 e) CD2
b) a corpus luteum
During a normal menstrual cycle in the non-pregnant female, the secretory phase of the uterine endometrium is dependent upon the presence, in the ovary, of: a) several secondary follicles b) a corpus luteum c) a minimum of 1 million primordial follicles d) a corpus albicans e) sperm in the oviduct
c) the acrosome
During spermatogenesis, the Golgi complex moves to one end of the spermatid nucleus and participates in the formation of: a) the sperm mid-piece b) the sperm flagellum c) the acrosome d) residual bodies e) androgen-binding protein
b) fall in blood levels of estrogen and progesterone
Each of the following is a casual event leading to menstruation. Which of these initiates all of the others? a) buckling of the coiled arterioles b) fall in blood levels of estrogen and progesterone c) regression of the corpus luteum d) shrinkage of the endometrium e) stasis of blood flow in endometrial arterioles
e) pepsinogen
Each of the following may be secreted by enteroendocrine cells except: a) gastrin b) secretin c) cholecystokinin-pancreozymin d) serotonin e) pepsinogen
a) macula densa
Electrolyte composition of urine is monitored by the: a) macula densa b) JG cells c) collecting tubule epithelium d) peritubular capillaries e) minor calyx
e) all of the above statements are true
A monocyte leaves the vasculature in a post capillary venule because: a) its cell surface integrins become activated b) its selection ligand binds to the endothelial cell integrin (selection) c) it releases its selectin binding and extravasates between two endothelial cells d) it slows down and rolls along the endothelial surface because sheer forces have changed (dropped) e) all of the above statements are true
d) Brunner's glands in the submucosa
A unique feature of the duodenum is the presence of: a) peyer's patches in the submucosa b) paneth cells in the mucosal glands c) goblet cells in the epithelium and crypts of Lieberkuhn d) Brunner's glands in the submucosa e) enterendocrine cells in the epithelial lining
d) they are located in the fenestrae of the endothelium
All of the following about filtration slits found in the glomerulus are true except: a) they are comprised of Nephrin b) they block molecules larger than 69K daltons c) they allow passage of amino acids and sugars d) they are located in the fenestrae of the endothelium e) they expand/contract as foot processes change size via actin microfilaments
e) angiotensin II converting enzyme
All of the following are associated with the juxtaglomerular apparatus except: a) renin granules b) modified smooth muscle cells of the tunica media c) macula densa d) afferent arteriole e) angiotensin II converting enzyme
b) cystic fibrosis patients have a mutation in the dynein gene resulting in non-motile cilia and many respiratory infections
All of the following are correct except: a) asthma effects the smooth muscle bundles in the respiratory system b) cystic fibrosis patients have a mutation in the dynein gene resulting in non-motile cilia and many respiratory infections c) emphysema patients have less surface area for gas exchange because of elastic and reticular fiber destruction d) a pneumothorax (collapsed lung) is due to air in the pleural cavity e) clara cells are only found in the bronchioles
b) B cells are more numerous than T-cells in blood
All of the following are correct except: a) specificity, diversity, and memory are important characteristics of the immune system b) B cells are more numerous than T-cells in blood c) interlukin 2, 4, and 5 promote proliferation of B cells d) T-cells can be very long lived e) the source of T cell specificity is the T-cell receptor
b) penetrate the tunica albuginea
For fertilization to occur, the spermatozoon must do all of the following except: a) undergo maturational changes such as the capacitation reaction b) penetrate the tunica albuginea c) penetrate the corona radiate d) penetrate the egg cell membrane e) penetrate the zona pellucida
e) the collecting duct is impermeable to water
Formation of hypotonic urine occurs mostly because: a) podocyte basement membranes become "leaky" b) renin is released from the JG cells c) proximal tubules do not resorb the normal quantity of sugars d) the distal tubule fails to meet its glomerulus of origin e) the collecting duct is impermeable to water
b) contain an extensive smooth endoplasmic reticulum which plays an important role in chemical transformation or detoxification of many hormones or drugs
Hepatocytes: a) contain very few mitochondria b) contain an extensive smooth endoplasmic reticulum which plays an important role in chemical transformation or detoxification of many hormones or drugs c) transport albumin from bile to the blood d) possess a prominent brush border e) form bile canaliculi via junctional contacts with endothelial cells
d) prolactin secretion would actually increase
If the long portal vessels (veins) of the pituitary gland should become occluded resulting in greatly diminished blood flow: a) the posterior lobe of the pituitary (pars nervosa) would become hypofunctional b) oxytoxin hormone secretion would actually decrease c) gonadotropin secretion would actually increase d) prolactin secretion would actually increase e) ACTH secretion would actually increase
d) circumvallate papillae of the tongue
If you wanted to find a taste bud quickly, which of the following would you choose to examine? a) filiform papillae of the tongue b) foliate papillae of the tongue c) the oropharynx d) circumvallate papillae of the tongue e) fungiform papillae of the tongue
e) utilizes all of the above strategies
In order to prevent self-digestion, the stomach: a) luminal epithelium is mostly mucous cells b) pumps carbonate into the mucous layer from the underlying vasculature c) forms HCl in the lumen rather than within the cells d) releases HCl upon stimulation e) utilizes all of the above strategies
d) glomerular fenestrated capillary endothelium, basement membrane, podocyte slit processes, urinary space
In order to sail into the urinary space of Bowman's capsule from the vasculature, the captain would have to traverse the filtration barrier in what sequence? a) efferent arteriole, basement membrane, fenestrae, podocytes, parietal layer b) distal convoluted tubule, macula densa, JG apparatus, affarent arteriole c) peritubular capillary endothelium, proximal convoluted tubule, lysosomes, vasa recta d) glomerular fenestrated capillary endothelium, basement membrane, podocyte slit processes, urinary space e) none of the above
c) cartilage decreases
In proceeding from a larger intrapulmonary bronchus to a respiratory bronchiole there are changes in the relative amounts of certain components of the wall. Which of the following is correct? a) goblet cells increase in number b) cartilage increases and smooth muscle decreases c) cartilage decreases d) both smooth muscle and goblet cells increase e) the number of ciliated cells and the height of the epithelium increase
d) intercalated ducts are the intralobular ducts
In the pancreas: a) the abundant acid enzymes present in the acinar cells make them basophilic b) centroacinar cells are the mucous cells of the acinus c) striated ducts reabsorb sodium from the pancreatic secretion d) intercalated ducts are the intralobular ducts e) all of the above are true
e) none of the above -it is secreted by beta cells of the pancreas
Insulin is secreted by: a) alpha cells of the pancreas b) delta cells of the pancreas c) cells in the medulla of the adrenal gland d) parafollicular cells of the thyroid gland e) none of the above
c) their peritubular capillaries are really the vasa recta in the medulla
Juxtamedullary glomeruli differ from other glomeruli in the cortex because: a) they lack a macula densa b) they lack podocytes on the glomerulus c) their peritubular capillaries are really the vasa recta in the medulla d) they have very short loops of Henle e) their proximal tubules drain directly into the collecting tubules, thus bypassing the loops of Henle
a) antigen presenting cells of the integument
Langerhan cells are: a) antigen presenting cells of the integument b) exocrine cells of the pancreas c) involved in depigmentation d) the main producers of keratohyaline granules e) rich in tyrosinase
d) A, B and C are all correct -is coordinated by gap junctions -is altered in kartagener syndrome -is a wave-like motion that facilitates the movement of mucus
Metachronal beating of cilia: a) is coordinated by gap junctions b) is altered in Kartagener syndrome c) is a wave-like motion that facilitates the movement of mucus d) A, B and C are all correct e) A and C only are correct
c) GnRH (LH-RH)
Ovulation is triggered by a surge in the release of what substance by the hypothalamic neurons? a) FSH b) LH c) GnRH (LH-RH) d) somatostatin e) dopamine
d) concentrations of lymphatic nodules in the ileum
Peyer's patches are: a) lymphatic regions in the colon b) absorptive regions of the jejunum c) lymphatic nodules in stomach mucosa d) concentrations of lymphatic nodules in the ileum e) restricted to the appendix
c) veins have a more prominent adventitia than arteries
Regarding blood vessels: a) veins have more elastic tissue than arteries b) arteries have a relatively thinner tunica media than do veins c) veins have a more prominent adventitia than arteries d) arteries have a thicker endothelial lining than veins e) elastic membranes are less pronounced in arteries than in veins
b) stem cells in the neck region
Regeneration of epithelial cell types in the stomach comes from differentiation of: a) surface mucous cells b) stem cells in the neck region c) cardiac gland cells d) body chief (peptic) cells e) pyloric submucosal glands
a) conversion of angiotensin I to II by the endothelial capillary cells of the lung
Regulation of blood pressure through the contraction of the tunica media of arterioles is achieved by: a) conversion of angiotensin I to II by the endothelial capillary cells of the lung b) production of erythropoietin (EPO) by the kidney interstitium c) stressing of intrafusal fubers d) release of secretory IgA in the lamina propria of the GI tract e) activation of the periarteriolar sheath region in the spleen
d) the papillary layer of the dermis
Rete pegs of the epidermis project into: a) the hypodermis b) pancinian corpuscles c) the reticular layer of the dermis d) the papillary layer of the dermis e) Meissner's corpuscles
e) do all of the above
Sertoli cells: a) provide physical support of spermatogenic cells b) phagocytose residual bodies c) form occluding junctions which act as the blood/testis barrier d) synthesize and secrete androgen binding protein e) do all of the above
b) of the production and release of acylglucosylceramide in the stratum granulosum
Skin allows humans to be terrestrial animals because: a) of the desmosomes in the stratum spinosum b) of the production and release of acylglucosylceramide in the stratum granulosum c) of the packed keratohyaline granules intermeshed with the tonofibrils in the stratum corneum d) the dermis is dense irregular connective tissue e) eccrine glands regulate water retention in the body
b) acidophilic; pars distalis
Somatotropin is secreted by ___ cells of the ___ of the pituitary gland. a) basophilic; pars intermedia b) acidophilic; pars distalis c) PAS+; pars distalis d) PAS-; pars nervosa e) basophils; pars distalis
d) the developing germ cells are associated with supporting cells
Spermatogenesis resembles oogenesis in which of the following? a) all products of the second meiotic division are viable b) both processes are completed during intrauterine life c) they both stop abruptly at middle age d) the developing germ cells are associated with supporting cells e) germ cells are arrested during prophase of the second mitotic division
b) involves cytodifferentiation of spermatids
Spermiogenesis a) occurs before puberty b) involves cytodifferentiation of spermatids c) consists of mitosis of spermatogonia d) occurs in diploid cells e) includes spermatocytogenesis, meiosis, and spermatogenesis
d) epididymis
Stereocilia are most prominent in which of the following? a) tubuli rect b) ampulla of vas deferens c) prostatic urethra d) epididymis e) seminiferous tubules
a) bacterial conversion of the glycogen into lactic acid from exfoliated cells
The acidic pH of the vaginal lumen is due primarily to: a) bacterial conversion of the glycogen into lactic acid from exfoliated cells b) bacterial conversion of mucus into lactic acid secreted by the vaginal glands c) secretion of acidmucopolysacchaires by glands in the vaginal walls d) secretion of HCl by cells int he vaginal glands e) acidic secretions from the uterine glands entering the vagina through the cervix
b) respiratory epithelium, bundles of smooth muscle, lots of elastic fibers, cartilaginous plates
The bronchi of the respiratory system would best be described as: a) respiratory epithelium, no glands, bundles of smooth muscle, few elastic fibers, no cartilage b) respiratory epithelium, bundles of smooth muscle, lots of elastic fibers, cartilaginous plates c) respiratory epithelium, abundant goblet cells, no smooth muscle, few elastic fibers d) ciliated pseudo-stratified columnar epithelium, no goblet cells, no smooth muscle, few elastic fibers e) ciliated simple columnar epithelium, abundant glands, no smooth muscle, few elastic fibers
b) has a hexagonal shape with central vein in the center
The classic liver lobule: a) is organized along a distributing vein b) has a hexagonal shape with central vein in the center c) has a triangular shape with central veins at each point of the triangle d) does not have portal triads associated with it e) is organized around a central bile duct
e) gas exchange
The conducting portion of the respiratory system functions in all of the following ways except: a) transport of air b) filtering incoming air c) warming incoming air d) moistening incoming air e) gas exchange
b) crypt of Lieberkuhn
The connective tissue core within a villus may contain all of the following except: a) a lacteal b) crypt of Lieberkuhn c) arterioles d) smooth muscle e) mast cells
d) Brunner's glands
The duodenum is characterized by: a) a lack of muscularis mucosa layer b) a proliferation of cardiac glands from the pylorus c) a large number of M cells d) Brunner's glands e) extensive rugae
b) CD4
The following cell surface marker is used by HIV to enter T cells. a) CD3 b) CD4 c) CD5 d) CD8 e) CD40
e) thymus
The following lymphoid organ is characterized by a high rate of programmed cell death (apoptosis), a) spleen b) lymph node c) pharyngeal tonsil d) GALT e) thymus
e) CD40
The following surface marker would be found on a B cell: a) CD3 b) CD5 c) CD8 D) CD30 e) CD40
e) progesterone
The human corpus luteum secretes: a) FSH b) glucocorticoids c) prolactin d) LH e) progesterone
b) bronchus
The last airway division to contain cartilage in the walls of the: a) trachea b) bronchus c) bronchioles d) terminal bronchioles e) alveolar ducts
e) LH
The major precipitating event in the ovulation of the Graafian follicle is a transient surge of the pituitary: a) MSH b) FSH c) PRL d) TSH e) LH
d) Brunner's glands
The mucosal lining of the gut may be comprised of all the following except: a) epithelium b) lamina propria c) muscularis mucosa d) Brunner's glands e) mucus cells
c) serous/amylase
The parotid gland is a branched acinar gland. Its secretory portion is composed almost exclusively of ___ cells which synthesize and secrete the enzyme, ___, in saliva. a) seromucus/pepsinogen b) serous/pepsinogen c) serous/amylase d) mucous/amylase e) mucous/HCl
d) ADH
The pars nervosa of the posterior pituitary gland functions in the storage and release of: a) ACTH b) FSH c) Prolactin d) ADH e) GH
b) inductive effects of the underlying embryonic mesoderm
The pattern of epidermal ridges (dermatoglyphics) is determined by: a) the rate of keratohyalin granule degradation b) inductive effects of the underlying embryonic mesoderm c) the super accretion of melanin granules d) occurs only in darker skinned humans e) the deep positioning of the Langerhans cells in the dermis
a) allows easy exchange of substances between blood and hepatocytes
The peri-sinusoidal space of disse: a) allows easy exchange of substances between blood and hepatocytes b) is related to the secretion of bile which flows in it toward the portal space c) is bound by continuous basal lamina and hepatocytes d) is filled by macrophages e) is an artifact created by fixation and processing for light microscopy
b) epicardium
The presence of a large number of fat cells, relatively large blood vessels, lymphatics and nerve fibers, covered by visceral mesothelium best describes which of the following? a) endocardium b) epicardium c) myocardium d) bundle of His; purkinje fibers e) parietal pericardium
d) Leydig cell
The product of this cell inhibits the release of LH from the pituitary? a) type A spermatogonia b) primary spermatocytes c) sertoli cell d) Leydig cell e) epididymal cell
d) stimulating the release of porforins
The protective mechanisms of antibodies include all of the following except: a) agglutination of pathogens b) opsonization facilitating phagocytosis c) neutralization of pathogens d) stimulating the release of porforins e) activation of complement
b) stomach
The segment of the GI tract which has mucus-secreting cells, a columnar epithelial lining and mucosal glands containing chief cells and parietal cells is the: a) esophagus b) stomach c) duodenum d) jejunum and ileum e) colon
b) IgD/T-cell receptors
The specificity trigger (i.e. surface recognition molecules) of B-cells are ___, while those of T-cells would include ___. a) IgD/IgM b) IgD/T-cell receptors c) IgG/T-cell receptors d) IgG/IgG e) IgE/T-cell receptors
d) secondary follicle
The stage in ovarian follicle development that immediately follows the multi laminar primary follicle is the: a) unilaminar primary follicle b) primordial follicle c) corpus luteum d) secondary follicle e) Graafian follicle
c) podocytes
The visceral layer of the glomerulus is comprised of: a) peritubular capillary endothelium b) macula densa endothelium c) podocytes d) stellate veins e) none of the above
c) PAS+; pars distalis
Thyrotropin is secreted by ___ cells of the ___ of the pituitary gland. a) basophilic; pars intermedia b) acidophilic; pars distalis c) PAS+; pars distalis d) PAS-; pars nervosa e) basophils; pars nervosa
a) epithelial layer of the alveolus
Type II pneumocytes are found in the: a) epithelial layer of the alveolus b) lumen of the alveolus c) epithelial layer of the terminal bronchiole d) capillary of the alveolus e) connective tissue of the alveolar septum
c) are permanent mucosal folds with a lamina propria core
Villi: a) are covered with ciliated cells b) are characteristic of the small and large intestine c) are permanent mucosal folds with a lamina propria core d) disappear when the intestine is distended e) contain many parasympathetic ganglia of Meissner's plexus
b) arteriole
When the number of circularly arranged smooth muscle cell layers in the tunica media of an arterial vessel is about 2-3, this vessel is called a(n): a) muscular artery b) arteriole c) arteriovenous anastomosis d) continuous capillary e) elastic artery
a) microfold (M) cell
Which of the following cells lining the ileum traps antigens and presents them to adjacent lymphocytes or macrophages? a) microfold (M) cell b) absorptive cell c) paneth cell d) goblet cell e) regenerative cell
a) sertoli cell
Which of the following cells secretes inhibin which inhibits the release of FSH? a) sertoli cell b) leydig cell c) type A spermatogonium d) sprimary spermatocyte e) spermatid
b) chief cells of the parathyroid gland
Which of the following endocrine cells produces a hormone which elevates blood calcium? a) cells with Herring bodies in the posterior pituitary gland b) chief cells of the parathyroid gland c) oxyphil cells of the parathyroid gland d) C-cells of the thyroid gland e) pinealocytes of the pineal gland
d) C-cells of the thyroid gland
Which of the following endocrine cells produces a hormone which lowers blood calcium? a) cells with Herring bodies in the posterior pituitary gland b) chief cells in the parathyroid gland c) oxyphil cells of the parathyroid gland d) C-cells of the thyroid gland e) pinealocytes of the pineal gland
c) vas deferens
Which of the following has 3 distinct layers of smooth muscle in its walls? a) seminiferous tubule b) epididymis c) vas deferens d) seminal vesicle e) tubuli recti
d) lip
Which of the following has a stratified squamous epithelium on both of its surfaces and a core of striated muscle between the connective tissues underlying each epithelial surface? a) colon-rectal junction b) hard palate c) trachea d) lip e) gingiva
d) descending aorta
Which of the following has the largest amount of elastic fibers in its wall? a) inferior vena cava b) pulmonary vein c) thoracic duct d) descending aorta e) splenic artery
d) a tributary of the hepatic vein
Which of the following is NOT a component of the portal space (triads) of the liver? a) a branch of the hepatic artery b) a tributary of the bile duct c) a branch of the portal vein d) a tributary of the hepatic vein e) a lymphatic vessel
d) bile flows toward the center of the lobule
Which of the following is NOT true of the classic liver lobule? a) the bile canaliculi are specialized spaces between adjacent hepatocyte cell membranes b) blood flows through sinusoids toward the center of the lobule c) plasma proteins synthesized by hepatocytes are secreted at the sinusoidal face of the cells d) bile flows toward the center of the lobule e) portal vein blood enters the sinusoids at the periphery of the lobule
a) prostate gland
Which of the following is characterized by a folded secretory epithelium which can be simple or pseudo stratified, a fibromuscular storm and many tubuloalveolar glands? a) prostate gland b) bulbourethral gland c) seminal vesicle d) vas deferens e) epididymis
e) thymus
Which of the following organs of a normal adolescent would not have lymphoid nodules containing germinal centers? a) lymph node b) spleen c) palatine tonsil d) pharyngeal tonsil e) thymus