Chapter 4

Question 1

Two adjacent authorthymic cells communicate via:
A. chemical synapses
B. gap junctions
C. adherens junctions
D. tight junctions

Answer 1

B. gap junctions

Question 2

Are there adherens junctions between myocardial cells?
A. yes
B. no

Answer 2

A. yes

Question 3

Two adjacent pumping cells communicate via:
A. chemical synapses
B. gap junctions
C. adherens junctions
D. tight junctions

Answer 3

B. gap junctions

Question 4

Treatment of WPW patients with beta blockers would most likely:
A. worsen tachycardia
B. stop the heart completely
C. slow down the heart rate
D. increase Pna+ in AR cells

Answer 4

C. slow down the heart rate

Question 5

When permeability to K+ is increased:
A. potassium enters a cell
B. potassium leaves a cell

Answer 5

B. potassium leaves a cell

Question 6

Circled 4 represents:
A. depolarization
B. repolarization

Answer 6

B. repolarization

Question 7

Circled 4 represents:

Answer 7

A. potassium influx
B. potassium efflux

Question 8

A drug that closes calcium-entry channels on myocardial pumping cells should:
A. increase heart rate
B. reduce stroke volume
C. depolarize the heart
D. increase MAP

Answer 8

B. reduce stroke volume

Question 9

Why do children suffering from this condition have so much edema?
A. levels of protein in the plasma are very low, reducing colloid pressure
B. protein leaks into the ISF pulling water along with it
C. they develop hypertension from very high blood volume that squeezes too much
D. they gain weight from eating so much carbohydrates
E. nobody really understands how this happens

Answer 9

A. levels of protein in the plasma are very low, reducing colloid pressure

Question 10

Which direction should water move based on solute concentration?
A. into the capillary
B. out of the capillary

Answer 10

A. into the capillary

Question 11

Histamine normally acts as a ________.A. systemic vasodilator
B. systemic vasoconstrictor
C. local vasodilator
D. local vasoconstrictor

Answer 11

C. local vasodilator

Question 12

Anaphylactic shock occurs when histamine is released systemically, causing:
A. a large increase in MAP
B. a large decrease in MAP
C. no change in MAP

Answer 12

B. a large decrease in MAP

Question 13

This drop in MAP is due to:
A. decreased cardiac output
B. reduced fluid volume
C. reduced peripheral resistance

Answer 13

A. decreased cardiac output
C. reduced peripheral resistance

Question 13

This drop in MAP is due to:
A. decreased cardiac output
B. reduced fluid volume
C. reduced peripheral resistance

Answer 13

A. decreased cardiac output
C. reduced peripheral resistance

Question 14

Which step would be most influenced by aspirin?

Answer 14

B. platelets aggregate into loose platelet plug.

Question 15

Which step would be most influenced by TPAs?

Answer 15

D. Fibrin slowly dissolved by plasmin

Question 16

Which of the following drugs would directly reduce heart rate when given to a hypertensive patient?
A. diuretics
B. beta blockers
C. angiotensin II receptor. blockers
D. ACE inhibitors

Answer 16

B. beta blockers

Question 17

What type of drug would directly increase the force of contraction of this heart muscle?
A. an ACE inhibitor
B. a chronotropic agent
C. an inotropic agent
D. a calcium channel blocker

Answer 17

C. an inotropic agent