Lecture 3 Exam

Question 1

Antidiuretic hormone, secreted from the _____ would be released in response to _____.
A. heart; high plasma osmolarity
B. heart; high MAP
C. hypothalamus; low plasma osmolarity
D. posterior pituitary; low MAP

Answer 1

D. posterior pituitary; low MAP

Question 2

Which is the correct match between signal and receptor location?
A. acetylcholine; vascular smooth muscle
B. ADH; vascular smooth muscle
C. aldosterone; vascular smooth muscle
D. ANP; pumping cells.

Answer 2

B. ADH; vascular smooth muscle

Question 3

Which statement is true about pumping cells of heart?
A. rapid depolarization is caused by increased permeability to calcium
B. repolarization is caused by decreased permeability to potassium
C. rapid depolarization is caused by increased permeability to sodium
D. repolarization is caused by increased to chloride

Answer 3

C. rapid depolarization is caused by increased permeability to sodium

Question 4

Decreased permeability to calcium during the pacemaker potential would directly:
A. increase heart rate
B. decrease heart rate
C. increase force of contraction
D. decrease force of contraction

Answer 4

B. decrease heart rate

Question 5

Which is the correct statement about how drugs for hypertension work?
A. calcium channel blockers decrease heart rate
B. decrease heart rate
C. ACE inhibitors increase peripheral resistance
D. beta blockers increase heart rate

Answer 5

A. calcium channel blockers decrease heart rate

Question 6

Which of the following signals near a tissue is most likely to increase the amount of blood delivered to that tissue?
A. increased [H+]
B. increased [O2]
C. decreased [CO2]
D. increased pH

Answer 6

A. increased [H+]

Question 7

Histamine released in response to injury or allergic reactions normally causes localized:
A. vasoconstriction and decreased colloid pressure
B. vasoconstriction and increased colloid pressure
C. vasodilation and increased colloid pressure
D. vasodilation and decreased colloid pressure

Answer 7

D. vasodilation and decreased colloid pressure

Question 8

Many patients with inflammatory artery disease take ____ on regular basis to ____.
A. TPA’s; causes fibrin formation
B. aspirin; inhibit thromboxane release
C. TPA’s; inhibit platelet clumping
D. aspirin; aid hemoglobin catabolism

Answer 8

B. aspirin; inhibit thromboxane release

Question 9

Dehydration can cause ____ which makes it ____ likely for autorhythmIc cells to fully repolarize.
A. hyperkalemia;less
B. hypokalemia;less
C. hyperkalemmia;more
D. hypokalemia;more

Answer 9

A. hyperkalemia;less

Question 10

During that increases the affinity of troponin for calcium in cardiac pumping cells would directly:
A. decrease heart rate
B. increase heart rate
C. decrease stroke volume
D. increase stroke volume

Answer 10

D. 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 II, and low ANP
B. High ADH, high EPI, high renin, high ANG II, and high ANP
C. high ADH, high EPI, low renin, high ANG II, and low ANP
D. low ADH, low EPI, low renin, low ANG II, and high ANP.

Answer 11

A. high ADH, high EPI, high renin, high ANG II, and low ANP

Question 12

systemic edema could be to be caused by:
A. high colloid pressure
B. low blood volume
C. high MAP
D. vasodilation

Answer 12

C. high MAP

Question 13

Which of the following would cause an increase in peripheral resistance?
A. elevated levels of epinephrine at beta-adrenergic receptors
B. increased levels of myosin kinase activity in smooth muscle
C. abnormally low hematocrit
D. decreased levels of antidiuretic hormone in the blood

Answer 13

B. increased levels of myosin kinase activity in smooth muscle

Question 14

Overheating causes peripheral vasodilation. Peripheral vasodilation directly ___ MAP, and the reflex response to this change in MAP is _____ in heart rate.
A. increase; a decrease
B. increases, an increases
C. decreases, a decrease
D. decreases, an increase

Answer 14

D. decreases, an increase

Question 15

Stroke volume should immediately decrease as a result of:
A. peripheral vasodilation
B. increased sympathetic output
C. overhydration
D. peripheral vasoconstriction

Answer 15

A. peripheral vasodilation

Question 16

Increase in hematocrit when exposed decrease result of:
A. low PO2 is detected by the kidney
B. low EPO is detected by red blood cells
C. low PO2 is detected by the bone marrow
D. high CO2 is detected by the hypothalamus

Answer 16

A. low PO2 is detected by the kidney

Question 17

Calcium channel blockers could cause:
A. vasoconstriction
B. increased heart rate
C. increased stroke volume
D. all of these choices are correcr
E. none of these choices are correct

Answer 17

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

Answer 18

B. hydrostatic pressure; pulmonary edema

Question 19

A decrease in blood pressure detected at the arterial baroreceptors would cause which of the following in response?
A. a decrease in heart contractility
B. a decrease in cardiac output
C. vasoconstriction of arterioles
D. a decrease in heart rate

Answer 19

C. vasoconstriction of arterioles

Question 20

Tissue plasminogen activators given to a patient having heart attacks can help to:
A. reduce platelet agglutination
B. dissolve fibrin clots
C. vasoconstriction of arterioles
D. a decrease in heart rate

Answer 20

B. dissolve fibrin clots

Question 21

Extra credit:
Which of the following has been in the formation of blood clots
A. smoking
B. high-fat diets
C. COVID 19
D. All of these

Answer 21

D. All of these