Deck 9: B--Cardiac Physiology

Question 1

Use this figure to answer the corresponding questions.
Which structures are open during isovolumetric relaxation?

Answer 1

E

Question 2

Use this figure to answer the corresponding questions.
Identify the location(s) where slow calcium channels are open.

Answer 2

C

Question 3

Use this figure to answer the corresponding questions.
Identify the location(s) where the cell's permeability to Na⁺ is the greatest.

Answer 3

A

Question 4

Use this figure to answer the corresponding questions.
Which structures have oxygenated blood flowing through them?

Question 5

Use this figure to answer the corresponding questions.
The structure labeled B

Question 6

Use this figure to answer the corresponding questions.
Identify the location(s) that indicates when fast calcium channels open within the cell.

Question 7

Describe the generation of pacemaker action potentials and then track the resulting impulse through the cardiac conduction system. Include the names of specific types of channels in the first part of your answer.

Question 8

Describe the mechanisms involved by which the parasympathetic and sympathetic nervous systems affect cardiac output. Include ACh, NE, regulated K⁺ channels, I_f channels and T-type Ca²⁺ channels, vagus nerve, cardiac nerves, contractility, stroke volume, and heart rate in your answer.

Question 9

Use this figure to answer the corresponding questions.
Identify the location(s) where voltage-gated potassium channels are open.

Question 10

List the following in the correct order of their occurrence within the ST segment on the ECG: ventricular ejection begins, lub sound, opening of semilunar valves, period of isovolumetric contraction, closing of AV valves, ventricular systole begins.

Question 11

Use the answer code below to complete the following statements.

Question 12

Describe how contractile cells are able to contract rapidly but are not likely to experience tetanus. Include the following terms in your

Question 13

Use this figure to answer the corresponding questions.
This graph shows the electrical activity for one of the heart's

Question 14

Use this figure to answer the corresponding questions.
Identify the location(s) where fast calcium channels are open.

Question 15

Use this figure to answer the corresponding questions.
This graph shows the electrical activity for one of the heart's

Question 16

Use this figure to answer the corresponding questions.
Identify the location(s) where fast calcium channels are open.

Question 17

Use this figure to answer the corresponding questions.
Which structures are closed during ventricular ejection?

Question 18

Describe the way in which high blood pressure and a defective semilunar valve can make it more difficult for the heart to pump blood into the systemic circulation and how these factors can decrease cardiac output. Include the following in your