wrong ans

Question 1

The contractile portion of the thin filament is composed of what protein?

Answer 1

D) actin

Question 2

What is the function of T tubules?

Answer 2

B) They conduct action potentials from the sarcolemma to the interior of the muscle cell.

Question 3

What is occurring during ventricular ejection?

Answer 3

D) The AV valves are closed and the semilunar valves are open as blood is leaving the ventricles.

Question 4

27) Cardiac output is determined by what two variables?

Answer 4

E) choices B and C
B) mean arterial pressure and total peripheral resistance
C) heart rate and stroke volume

Question 5

29) Which of the following would NOT result from an increase in ventricular contractility?

Answer 5

C) decreased end-diastolic volume

Question 6

34) Resistance to blood flow is regulated primarily by what blood vessels?

Answer 6

C) arterioles

Question 7

38) Anabolic reactions do not ________.

Answer 7

D) release energy

Question 8

39) Glycolysis converts glucose into two ________ molecules.

Answer 8

D) pyruvic acid

Question 9

42) Each turn of the citric acid cycle produces ________.

Answer 9

B) 1 FADH2, 1 ATP, and 3 NADH

Question 10

45) Under normal conditions, which Starling forces favor filtration?

Answer 10

B) capillary hydrostatic pressure and interstitial fluid osmotic pressure

Question 11

46) What factor assists venous return to the heart?

Answer 11

A) valves in the vein
B) the muscle pumps in the legs
C) the respiratory pump
D) the lymphatic system returning interstitial fluid
E) all of the above assist venous return

Question 12

47) ________ are responsible for the detection of mean arterial pressure.

Answer 12

B) Arterial baroreceptors

Question 13

53) Stretch receptors in the aortic arch and carotid sinus

Answer 13

B) serve as baroreceptors that affect vagus and sympathetic nerve activity

Question 14

55) The average life span of an erythrocyte in the circulation is

Answer 14

e) 120 days.

Question 15

56) What is the state in a skeletal muscle when there is no relaxation is occurring?

Answer 15

a) tetanus

Question 16

57) Compared to skeletal muscle fibers, the fibers of the heart are depolarized for ___ period of time.

Answer 16

b) a longer

Question 17

58) The second heart sound (dupp) closely follows which of the events listed below?

Answer 17

d) Semilunar valves closing

Question 18

62) Which of the following structures is used to control the flow of blood through a capillary bed?

Answer 18

b) precapillary sphincters

Question 19

63) ATP formation in the electron transport system is called ________.

Answer 19

B) oxidative phosphorylation

Question 20

64) The opposite process of glycogenesis is ________.

Answer 20

C) glycogenolysis

Question 21

65) The Cori cycle converts ________ to pyruvic acid.

Answer 21

C) lactic acid

Question 22

66) Which of the following would NOT result in an increase in arterial blood pressure?

Answer 22

d) Increased stroke volume

Question 23

71) What type of tissue is especially dependent on adequate plasma glucose levels?

Answer 23

C) Nervous

Question 24

72) The main factor determining differences in energy requirements of individuals of the same gender and
body size is the difference in ________.

Answer 24

A) physical activity

Question 25

77) Tissue damage by free radicals is prevented to some extent by all of the following EXCEPT _____. A) beta-carotene (Vit A)

Answer 25

C) vitamin D

Question 26

81) Which of the following is an adipose tissue hormone that stimulates glucose utilization and fatty acid oxidation in muscle cells, thereby producing an insulin-sensitizing, antidiabetic effect?

Answer 26

B) Adiponectin

Question 27

82) The risk of cardiovascular disease is increased in someone with ________.

Answer 27

B) a large waist measure (>40 men, >35 women)