3rd 25

Question 1

The second hear sound immediately follows

Answer 1

The T wave

Question 2

The heart rate tends to be higher in

Answer 2

Women than in Men

Question 3

The ____ commonly measures about 75 mL.

Answer 3

Stroke Volume

Question 4

The conduction of electrical signals is fastest in

Answer 4

Purkinje Fibers

Question 5

Baroreceptors are located in

Answer 5

the aorta and carotid sinuses

Question 6

During isovolumetric contraction, the pressure in the ventricles

Answer 6

Rises Rapidly

Question 7

Isovolumetric contraction occurs during the ___ of the electrocardiogram.

Answer 7

R Wave

Question 8

Which of the following sequences best represents the course of a nerve impulse through the heart.

Answer 8

Sa node >AV node>bundle of his>Purkinje fibers

Question 9

Freshly oxygenated blood is received by the ______

Answer 9

Left Atrium

Question 10

All of the following are true regarding the ventricles EXCEPT

Answer 10

The left ventricle expels a greater volume of blood per beat than does the right ventricle.

Question 11

A persistent, resting heart rate of less than 60 bpm is called _____.

Answer 11

bradyarrhythmia

Question 12

The innermost lining of the heart wall is ______

Answer 12

endocardium

Question 13

An anatomical arrangement that reduces the risk for myocardial infarctions is _________.

Answer 13

arterial anastomoses in the coronary circulation.

Question 14

Compared to skeletal muscle, cardiac muscle has ________.

Answer 14

more mitochondria

Question 15

A substance that reduces the heart rate is said to exert ________

Answer 15

a negative chronotropic effect.

Question 16

Which of the following reduces the heart rate?

Answer 16

acetylcholine (Ach)

Question 17

Because the human heart is myogenic _______

Answer 17

It will even beat even if all nerves to it are severed.

Question 18

Which of the following vessels are in the coronary sulcus?

Answer 18

the marginal artery and the circumflex artery.

Question 19

All valves are closed during _______ .

Answer 19

isovolumetric contraction

Question 20

When the heart is beating at a rate of 75 BPM, the duration of one cardiac cycle is ____ seconds.

Answer 20

0.8

Question 21

Cardiac output is about _____ liters/min.

Answer 21

4-6

Question 22

If the vagal nerves to the heart were cut, the result would be that _______.

Answer 22

the heart rate would increase by about 25 bpm.

Question 23

The foramen ovale _____

Answer 23

connects the two atria in the fetal heart

Question 24

Which vessel receives blood during the right ventricular systole?

Answer 24

pulmonary arteries

Question 25

Which of the following is not part of the conduction system of the heart?

Answer 25

AV valve