Histology practice questions (midterm)
What collagen type is found in reticular fibers?
3
All of the following are layers of hair except? A. eponychium B. external root sheath C. cuticle D. glassy membrane E. internal root sheath
A
Epidermis contains all of the following cells except? A. Adipose cells B. Keratinocytes C. Langerhans cells D. Merkel's cells E. Melanocytes
A
Middle layer of the epidermis is? A. granulosum B. corneum C. basale D. spinosum E. lucidum
A
Pseudostratified columnar epithelium is characterized by: A. May contain goblet cells B. Absence of microvilli or cilia C. It may ne keratinized or non-keratinized D. Has no basement membrane D. Contains 4-5 cell layers
A
Resident connective tissue cells include all the following except? A. neutrophils B. fibroblasts C. Macrophages D. myofibroblasts
A
Connexins are found in? A. fascia adherens B. gap junctions C. desmosomes D. tight junctions E. adherens junctions
B
The following are connective tissue cells except? A. myofibroblasts B. erythroblasts C. fibroblasts D. fat cells E. plasma cells
B
Skeletal myocyte contains all of the following except? A. H band B. B band C. I band D. M line E. A band
B.
Which is false about smooth muscles? A. they are involuntary B. they have no myofilaments C. they have no sarcomeres D. they are not striated E. They can contract for long times
B.
The appearance of brush border in certain types of epithelium is due to? A. presence of cilia B. presence of goblet cells C. present of microvilli D. presence of mucus E. presence of desmosomes
C
Which of the following fibers are found in weight bearing ligaments? A. elastic fibers B. reticular fibers C. collagen fibers D. mixed fibers E. sharpey's fibers
C
Which of the following is true about smooth muscle? A. they have sarcomeres B. they contract rapidly but for short times C. contraction is facilitated by calcium ions D. they are voluntary E. they are striated
C
Epithelium is characterized by the following except? A. Cells tend to form junction B. Does not contain blood vessels C. Absence of cell polarity D. it is mitotically active E. Little intercellular material
C.
Which is false about smooth muscles? A. they are all involuntary B. they have no sarcomeres C. they are not striated D. they contract spontaneously E. they contract rapidly but for short times
E
The skin cells that provide surface immunity?
Langerhans cells
Calcium ions enter the muscle fibers through?
T-tubules
Structure that surrounds individual muscle fiber
endomysium
The epithelium which lines the internal surfaces of blood vessels is?
endothelium
Collagen is synthesized by?
fibroblasts
Sebaceous glands are usually associated with?
hair follicles
What is the junction that binds epithelium to the basement membrane?
hemidesmosome
According to secretory mechanisms, sebaceous glands are? A. merocrine B. paracrine C. apocrine D. endocrine E. holocrine
holocrine
Chromosomes are less visible during what phase?
interphase
Are smooth muscles voluntary or involuntary
involuntary
Largest connective tissue cells
macrophages
Main component of connective tissue? (2 answers)
matrix and cells
The inner most layer of hair
medulla
Skeletal red muscle fibers are characterized by? (rich in what?)
mitochondria
Are smooth muscles striated or not striated
not striated
The lining epithelium of trachea is ___?
pseudostratified columnar ciliated epithelium
Epithelium that has a single layer of cells is classified as?
simple
The lining epithelium of blood vessels is what type of tissue?
simple squamous endothelium
Epithelium which has several layers of cells is called?
stratified
Skin epidermis is lined by what type of tissue?
stratified squamous keratinized epithelium
In the skin, mitosis occurs more frequently in ___?
stratum basale
Skin melanocytes are located in?
stratum basale
Which of the following is not essential for muscle contraction? troponin, myosin, tubulin, ATP, Ca
tubulin
