Exam 2

Question 1

Antidiuretic hormone, secreted from the _______ would be released in response to_______

A. heart; high plasma osmolarity.
B. posterior pituitary; low MAP.
C. anterior pituitary; high plasma osmolarity.
D. heart; high MAP.

Answer 1

posterior pituitary; low MAP

Question 2

Which is the correct match between signal and receptor location?

A.acetylcholine: vascular smooth muscle,
B. ANP: pumping cells.
C.aldosterone: vascular smooth muscle.
D. ADH: vascular smooth muscle.

Answer 2

ADH: vascular smooth muscle.

Question 3

Which statement is true about BOTH autorhythmic and pumping cells of the heart.

A. Rapid depolarization is caused by increased permeability to sodium.
B. Repolarization is caused by increased permeability to potassium.
C. Rapid depolarization is caused by increased permeability to calcium.
D. Repolarization is caused by decreased permeability to potassium.

Answer 3

Repolarization is caused by increased permeability to potassium.

Question 4

Increased permeability to sodium during the pacemaker potential would directly:

A. decrease heart rate.
B. increase heart rate.
C. decrease force of contraction
D. increase force of contraction.

Answer 4

increase heart rate.

Question 5

Which is the correct statement about how drugs for hypertension works ?
A. Beta blocker reduces peripheral resistance
B. diuretics increase stroke volume.
C. ACE Inhibitor reduces peripheral resistance
D. calcium channel blockers increase heart rate.

Answer 5

ACE inhibitor reduces peripheral resistance

Question 6

Which of the following signals near a tissue is most likely to increase the amount of blood delivered to that
tissue?

A. Decreased [O2].
B. Increased IO-l.
C.Decreased [CO2).
D. Decreased (H’).

Answer 6

Decrease [o2]

Question 7

Histamine released in response to injury or allergic reactions normally causes localized:

A. vasoconstriction and increased colloid pressure.
B: vasoconstriction and decreased colloid pressure.
(C) vasodilation’ and decreased colloid pressure.
D. vasodilation and increased colloid pressure.

Answer 7

vasodilation’ and decreased colloid pressure.

Question 8

Many patients with inflammatory artery disease take___ on a regular basis to____

A. TPA’s; cause fibrin formation
B. aspirin; aid hemoglobin catabolism.
C.TPA’s; inhibit platelet clumping.
D. aspirin; inhibit thromboxane release.

Answer 8

aspirin; inhibit thromboxane release.

Question 9

Excessive consumption of water can cause___
which makes it____ likely for autorhythmic cells to

A. hyperkalemia; more.
B. hypokalemia; more.
C. hyperkalemia; less.
D. hypokalemia; less.

Answer 9

hyperkalemia; less.

Question 10

A drug that increases the activity of the Ca** ATPase in cardiac pumping cells would cause:

A increased heart rate.
B. decreased heart rate
C. increased stroke volume.
D. decreased stroke volume

Answer 10

Increase Stroke volume

Question 11

Which of the following would best describe the results of a blood test from an
extremely dehydrated patient with low MAP?

A. high ADH, high EPI, high renin, high ANG Il and high ANP.
B.high ADH, high EPI, high renin, high ANG Il and low ANP.
C. high ADH, high EPI, low renin, high ANG Il and low ANP.
D. low ADH, low EPI, low renin, low ANG Il and high ANP.

Answer 11

B. high ADH, high EPI, high renin, high ANG Il and low ANP.

Question 12

Systemic edema could be to be caused by

A, low MAP.
B. low blood volume.
C.low colloid pressure.
D. vasodilation.

Answer 12

C.low colloid pressure.

Question 13

Each of the following factors would decrease peripheral resistance except one. Identify the exception.

A. Elevated levels of epinephrine at beta adrenergic receptors.
B. decreased levels of antidiuretic hormone in the blood.
C. Abnormally high hematocrit.
D. Increased levels of myosin phosphatase activity in smooth muscle.

Answer 13

C. Abnormally high hematocrit.

Question 14

Peripheral vasodilation caused by overheating is followed by______ as the baroreceptor reflex is activated

A. an increase in heart rate.
B. a decrease in heart rate.

Answer 14

A. an increase in heart rate.

Question 15

Stroke volume immediately decreases when______ occurs, prior to any compensation for low MAP.

A peripheral vasoconstriction.
B. increased sympathetic output.
C. overhydration.
D. peripheral vasodilation.

Answer 15

D. peripheral vasodilation.

Question 16

An increase in hematocrit when exposed to high altitude is initiated when:

A. low PO, is detected by the bone marrow.
B. low EPO is detected by red blood cells.
C low PO is detected by the kidney.
D. high CO, is detected by the hypothalamus.

Answer 16

low PO is detected by the kidney.

Question 17

Calcium channel blockers could cause:

A. vasoconstriction.
B. increased heart rate.
C. increased stroke volume.
D. none of these choices are correct.
E all of these choices are correct.

Answer 17

none of these choices are correct.

Question 18

When the left side of the heart pumps less blood than the right side of the heart,___ builds up in the pulmonary circuit, causing______

A. hydrostatic pressure; pulmonary edema.
B. myosin kinase; slower breathing.
C. osmotic pressure; edema.
D. extracellular calcium; reduced stroke volume.

Answer 18

A. hydrostatic pressure; pulmonary edema.

Question 19

A decrease in blood pressure detected at the arterial baroreceptors would cause which of the following in

A. a decrease in heart contractility.
B. vasoconstriction of arterioles.
C. a decrease in cardiac output.
D. a decrease in heart rate.

Answer 19

B. vasoconstriction of arterioles

Question 20

Tissue plasminogen activators given to a patient having a heart attack can help to:
A. dissolve fibrin clots.
C. dilate the coronary arterioles.
B. reduce platelet agglutination. - Afpilin
D. increase Ca**-troponin interactions.

Answer 20

A. dissolve fibrin clots.