Chapter 20 - Vocabulary

Question 1

The period of relaxation and repolarization of the atria

Answer 1

Atrial diastole

Question 2

Return blood to the heart

Answer 2

Veins

Question 3

The amount of blood pumped by the left ventricle in one minute

Answer 3

Cardiac output

Question 4

The period between the start of one heartbeat and the beginning of the next

Answer 4

Cardiac cycle

Question 5

Small blood vessels that collect spent blood from capillary beds and transport it to the larger veins for transport back to the heart

Answer 5

Venules

Question 6

A lower than normal heart rate

Answer 6

Bradycardia

Question 7

A faster than normal heart rate

Answer 7

Tachycardia

Question 8

Carry blood away from the heart

Answer 8

Arteries

Question 9

The cells that initiate and distribute the stimulus to contract the heart are part of this

Answer 9

Conducting system

Question 10

The pressure in the wall of the left ventricle during ejection

Answer 10

Afterload

Question 11

The maximum amount of blood held by the ventricles, which occurs after atrial systole (approximately 130 mL)

Answer 11

End diastolic volume

Question 12

The ventricles contract and push blood into the pulmonary and aortic trunks (lasts approximately 270 ms)

Answer 12

Ventricular systole

Question 13

A small branch of an artery leading into capillaries

Answer 13

Arterioles

Question 14

The network of blood vessels that carries blood to and from the gas exchange surfaces of the lungs

Answer 14

Pulmonary circuit

Question 15

The period of relaxation and repolarization of the ventricles

Answer 15

Ventricular diastole

Question 16

The network of blood vessels that carries blood to and from the entire body (not including the lungs)

Answer 16

Systemic circuit

Question 17

The degree of stretching in ventricular muscles during ventricular diastole

Answer 17

Preload

Question 18

The atria contract and “top off” the blood volume in the ventricles (lasts approximately 100 ms)

Answer 18

Atrial systole

Question 19

The ability of cardiac muscle tissue to contract on its own, without neural or hormonal stimulation.

Answer 19

Automaticity

Question 20

Microscopic thin-walled vessels which interconnect the smallest arteries and the smallest veins. Also called exchange vessels, because their thin walls permit the exchange of nutrients, dissolved gases, and wastes between the blood and surrounding tissues.

Answer 20

Capillaries

Question 21

The volume of blood pumped from the left ventricle per beat

Answer 21

Stroke volume