FINALS - Ch. 25 (Cardiovascular System)

Question 1

Which layer of the heart is the outermost layer, which contains fat to cushion the heart?

Answer 1

Epicardium

Question 2

What valve prevents blood from flowing from the aorta back into the left ventricle?

Answer 2

Aortic

Question 3

Which component of the cardiac conduction system extends from the AV node to the superior end of the interventricular septum?

Answer 3

AV bundle

Question 4

Which part of the cardiac conduction system is located in the wall of the right atrium?

Answer 4

SA node

Question 5

Which part of the cardiac conduction system is located in the walls of the ventricles and cause the ventricles to contract?

Answer 5

Purkinje fibers

Question 6

What can cause longer than normal heart contractions?

Answer 6

High concentration of calcium ions

Question 7

What does NOT cause an increase in heart rate?

Answer 7

Parasympathetic nerve stimulation

Question 8

The cardiac control center responds to:

Answer 8

Changes in blood pressure

Question 9

What results in an increased blood pressure?

Answer 9

Increased cardiac output