1. Practice Questions Block 2

2. Question 1 If muscle cells in the human body consume O 2 faster than it can be supplied, which of the following is likely to result? A.The muscle cells will have more trouble making enough ATP to meet their energy requirements. B.The cells will not be able to carry out oxidative phosphorylation. C.The cells will consume glucose at an increased rate. D.Only the first two answers are correct. E.The first three answers are correct.

3. Question 2 Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule? A.glycolysis B.reduction of pyruvate to lactate C.synthesis of acetyl CoA from pyruvate D.the citric acid cycle E.the electron transport chain

4. Question 3 Pressure is greatest in the ventricles when __________. A.blood arrives at the right ventricle B.blood arrives at the left atrium C.AV valves are open and semilunar valves are closed D.the ventricles contract E.the atria contract during early systole

5. Question 4 What would you expect to see in an individual with low levels of blood protein in the capillaries? A.increased movement of fluid into the capillaries from the extracellular environment B.increased blood pressure C.a net gain of fluid in the capillaries D.decreased lymph E.edema in the body tissues

6. Question 5 When you exhale, __________. A.both the diaphragm and rib muscles contract B.both the diaphragm and the rib muscles relax C.the rib muscles contract and the air pressure in the alveoli becomes lower than atmospheric pressure D.the volume of the chest cavity increases E.the diaphragm relaxes and the lungs expand

7. Question 6 Which of the following is the main factor that causes lymph to move through lymphatic vessels? A.blood pressure B.osmotic pressure C.contractions of capillaries D.contractions of body muscles near lymph vessels E.diffusion

8. Question 7 What happens when the CO 2 level from cellular respiration increases in the blood? A.Cellular respiration decreases. B.A decrease in the pH of the cerebrospinal fluid triggers the brain's breathing control centers, which stimulate diaphragm and rib muscle contractions. C.The pH of the cerebrospinal fluid also increases and is detected by O 2 sensors in arteries near the heart. D.The O 2 level automatically increases.

9. Question 8 What is unique about blood in pulmonary arteries compared with blood in other arteries? A.Blood in pulmonary arteries is always blue; it is red in all other arteries. B.It is moving away from the heart. C.It is moving toward the heart. D.It is loaded with carbon dioxide. E.There is no difference; it is the same as blood in other arteries.

10. Question 9 When you hold your breath, which of the following blood gas changes leads initially to the urge to breathe again? A.rising oxygen concentration B.rising carbon dioxide concentration C.falling oxygen concentration D.falling carbon dioxide concentration E.None of the listed responses is correct.

11. Question 10 A mutation that results in a nonfunctioning nitric oxide receptor would cause __ A.increased vasoconstriction B.decreased vasoconstriction C.decreased blood pressure D.increased vasodilation E.decreased vasodilation

12. Question 11 What would you expect to see in an individual with low levels of blood protein in the capillaries? A.increased movement of fluid into the capillaries from the extracellular environment B.increased blood pressure C.a net gain of fluid in the capillaries D.decreased lymph E.edema in the body tissues

13. Question 12 Biceps muscle is connected to radius bone by: A.Biceps tendon B.Articular cartilage C.Biceps ligament D.Triceps muscle

14. Question 13 Skeletal muscle contraction may assist in all of the following except: A.Movement of fluid through body B.Body temperature regulation C.Posture D.Peristalsis

15. Question 14 Muscles cause movement in joints by: A.Increasing in length, thereby pushing the muscle’s origin and insertion farther apart B.Filing with blood, expanding and increasing distance between ends of a muscle C.Decreasing in length, bringing muscle’s origin and insertion together D.Stimulating neurons to “twitch” in tendons

16. Question 15 Surgical cutting of which of the following tissues would result in the least amount of pain? A.Muscle B.Bone C.Cartilage D.Skin

17. Question 16 Production of which of the following cells would most likely be increased by parathyroid hormone: Osteocyte Osteoclast Osteoblast Osteoprogenitor

18. Answers 1.E 2.A 3.D 4.E 5.B 6.D 7.D 8.D 9.B 10.E 11.E 12.A 13.D 14.C 15.C 16.B