30 Most Missed

1) The ________ is an epithelial layer that covers most of the exposed surface of the eye. A) conjunctiva B) cornea C) iris D) anterior chamber E) canthus

A) conjunctiva

//(For The Following Question Only, SELECT ALL THAT APPLY// 4) Which of the following organs/tissues has secondary endocrine functions? A) heart B) digestive tract C) kidneys D) gonads

A) heart B) digestive tract C) kidneys D) gonads

23) //For The Following Question Only, SELECT ALL THAT APPLY// The activities of the digestive system are regulated by A) hormones produced by the digestive tract itself. B) parasympathetic neurons. C) local factors determined by the contents of the digestive tract. D) nerve plexuses intrinsic to the gut itself.

A) hormones produced by the digestive tract itself. B) parasympathetic neurons. C) local factors determined by the contents of the digestive tract. D) nerve plexuses intrinsic to the gut itself.

15) The umbilical arteries, which flow to the placenta, arise from the ________ arteries. A) internal iliac B) femoral C) coronary D) superior mesenteric E) pulmonary

A) internal iliac

20) Secondary bronchi supply air to the A) lungs. B) lobes of the lungs. C) lobules of the lungs. D) alveoli. E) alveolar ducts.

B) lobes of the lungs.

6) An obstruction in blood flow to the kidneys would ultimately result in A) decreased iron absorption. B) renal anemia. C) increased erythropoiesis. D) decreased erythropoiesis. E) increased production of calcitriol.

C) increased erythropoiesis.

//(For The Following Question Only, SELECT ALL THAT APPLY// 17) Lymphocytes A) are all actively phagocytic. B) destroy red blood cells. C) recognize and respond to antigens. D) are primarily found in red bone marrow. E) decrease in number during infection.

C) recognize and respond to antigens.

25) The last approximately 15 cm of the digestive tract is the A) anus. B) anal canal. C) rectum. D) sigmoid colon. E) rectal column.

C) rectum.

21) Henry's law states that A) gas volume and temperature are directly proportional. B) gas volume and pressure are inversely proportional. C) the volume of gas that will dissolve in a solvent is proportional to the partial pressure of that gas. D) in a mixture of gases such as air, the total pressure is the sum of the individual partial pressures of the gases in the mixture. E) gas pressure is inversely proportional to gas volume.

C) the volume of gas that will dissolve in a solvent is proportional to the partial pressure of that gas.

30) Which of these descriptions best matches the term "myenteric plexus"? A) sensory component of mucosal plexus B) sensory neural network in the serosa C) triggers secretion of a watery fluid D) coordinates activity of muscularis externa E) loose connective tissue layer containing blood vessels

D) coordinates activity of muscularis externa

19) The human immunodeficiency virus (HIV), which causes the disease known as AIDS, selectively infects ________ cells. A) B B) plasma C) cytotoxic T D) helper T E) professional antigen presenting cells

D) helper T

11) In large arteries, the thickest layer of elastic fibers is called the A) tunica intima. B) external elastic membrane. C) tunica media. D) internal elastic membrane. E) tunica externa.

D) internal elastic membrane.

7) Aged and damaged erythrocytes are broken down by macrophages in all the following places EXCEPT A) bone marrow. B) liver. C) spleen. D) kidney. E) None of the answers is correct.

D) kidney.

24) //For The Following Question Only, SELECT ALL THAT APPLY// The gastroileal reflex A) empties the duodenum. B) promotes gastric secretion. C) decreases peristaltic activity. D) moves some chyme to the colon. E) is relayed through the CNS.

D) moves some chyme to the colon. E) is relayed through the CNS.

//(For The Following Question Only, SELECT ALL THAT APPLY//14) Possessing both superficial and deep veins in the neck and limbs is physiologically useful to A) minimize heat loss in cold weather. B) maximize heat loss in warm weather. C) protect high pressure veins from injury because they can run along the course of bones. D) prevent the skin from turning purple when much of the blood has been deoxygenated. E) confuse the heck out of anatomy instructors.

A) minimize heat loss in cold weather. B) maximize heat loss in warm weather.

29) //For The Following Question Only, SELECT ALL THAT APPLY// What is the function of the duodenal ampulla? A) regulates the passage of pancreatic juice into the duodenum B) regulates the passage of bile into the duodenum C) regulates the passage stomach contents into the duodenum D) stores intestinal secretions until stimulated to release by CCK E) contraction of the duodenal ampulla squirts chyme out into the lumen of the duodenum

A) regulates the passage of pancreatic juice into the duodenum B) regulates the passage of bile into the duodenum

//(For The Following Question Only, SELECT ALL THAT APPLY//3) The middle ear communicates with the nasopharynx through the A) auricle. B) Eustachian tube. C) auditory tube. D) pharyngotympanic tube. E) auditory meatus.

B) Eustachian tube. C) auditory tube. D) pharyngotympanic tube.

26) The final electron acceptor of the electron transport system is A) water. B) O2. C) H+. D) NADH E) NADH and FADH2.

B) O2.

13) Did you hear about Raul? He had a horrible chainsaw accident and cut several major blood vessels in his head and neck! As a result of this injury, you would expect to observe all of the following EXCEPT A) an increased heart rate. B) an increase in cardiac output. C) an increased secretion of renin by the kidneys. D) cold, clammy skin. E) an increase in total peripheral resistance.

B) an increase in cardiac output.

//(For The Following Question Only, SELECT ALL THAT APPLY//12) The ability of capillaries to release fluid into the tissue beds and then recover most of that fluid back into the vasculature as blood flows from the arterial to the venous end of each capillary is due to changes in the parameter(s) known as ______________ A) venous pressure. B) capillary hydrostatic pressure. C) net filtration pressure. D) blood colloid osmotic pressure (BCOP). E) pulse pressure.

B) capillary hydrostatic pressure. C) net filtration pressure.

22) Low pH alters hemoglobin structure so that oxygen binds less strongly to hemoglobin at low PO2. This increases the effectiveness of A) external respiration. B) internal respiration. C) carbon dioxide transport. D) hemoglobin synthesis. E) acid-base balance.

B) internal respiration.

5) Each of the following is true of the pineal gland EXCEPT that it A) is a component of the epithalamus. B) is a component of the hypothalamus. C) secretes melatonin. D) contains pinealocytes. E) responds to light and darkness.

B) is a component of the hypothalamus.

27) Typical renal blood flow is about ________ percent of cardiac output under resting conditions. A) 5 B) 15 C) 25 D) 35 E) 45

C) 25

10) What effect would compressing the inferior vena cava just below the diaphragm have on cardiac function? A) Stroke volume would increase. B) Cardiac output would increase. C) Sympathetic stimulation of the heart would increase. D) Heart rate would decrease. E) None of the answers is correct.

C) Sympathetic stimulation of the heart would increase.

28) Substances larger than ________ do not pass through the filtration membrane. A) sodium ions B) glucose C) albumin D) amino acids E) urea

C) albumin

18) The classic pathway of complement activation begins when the complement protein binds to A) the cell wall of bacteria. B) the plasma membrane of bacteria. C) an antibody attached to an antigen. D) a cell surface antigen. E) mannose.

C) an antibody attached to an antigen.

//(For The Following Question Only, SELECT ALL THAT APPLY// 16) The primary function(s) of the lymphatic system is(are) A) helping maintain normal blood volume and the composition of interstitial fluid. B) the transport of hormones. C) defending the body against both environmental hazards and internal threats. D) the production and distribution of plasma proteins. E) both the transport of hormones and the production and distribution of plasma proteins.

C) defending the body against both environmental hazards and internal threats.A) helping maintain normal blood volume and the composition of interstitial fluid.

9) If there is a complete block between the SA node and the AV node, how would the ECG be affected? A) The P-R interval will be shorter. B) The QRS duration will be longer. C) There will be much bigger P waves. D) The ventricles will stop beating. E) The rate of P waves will be faster than the rate of QRS complexes.

E) The rate of P waves will be faster than the rate of QRS complexes.

8) The yellow color that is visible in the eyes and skin in jaundice results from all of the following EXCEPT A) excessive amounts of bilirubin in the plasma. B) liver disease, such as hepatitis. C) destruction of hemoglobin. D) blockage of bile ducts. E) hematuria.

E) hematuria.

2) Which of the following does NOT occur when light stimulates a rod cell? A) ganglion cells pick up changes in activity in the bipolar cells. B) retinal changes to a more linear shape. C) the dark current decreases. D) Na+ permeability changes. E) photoreceptors release more neurotransmitter.

E) photoreceptors release more neurotransmitter.