Ch 2. Heart

Question 1

POWEPHYS ACTIVITY

Answer 1

ENJOY

Question 2

Cardiac Output

Answer 2

Cardiac output (CO) is the amount of blood ejected from the heart each minute.

CO = HR x SV

Normal adult cardiac output (CO) is approximately 5 L per minute

Question 3

Define the following;

Systole, Diastole, Autonomic Nervous System, Endocrine system, Short Axis

Answer 3

EDV is the amount of blood in the ventricle at the end of the resting phase
ESV is the amount of blood remaining in the ventricle after contraction

Question 4

Stroke Volume

Answer 4

SV is the amount of blood ejected by one ventricle per each contraction

SV = ESV - EDV

Question 5

On the ECG, ventricular depolarization corresponds to the

Answer 5

QRS complex

Question 6

QUESTION SET QUESTIONS

Answer 6

ENJOY

Question 7

Instrument used to measure cardiac volumes…

Answer 7

MRI

Question 8

Exercise caused cardiac cycle length to…

Answer 8

Decrease

Question 9

Exercise caused ESV to…

Answer 9

Decrease

Question 10

Exercise caused SV to…

Answer 10

Increase

Question 11

What caused the change in SV with exercise?

Answer 11

Increased force of cardiac muscle contraction

Question 12

What caused the change in CO with exercise?

Answer 12

Increased HR and SV

Question 13

Why is the change in CO with exercise important?

Answer 13

Increase in CO is necessary to transport needed nutrients and oxygen to tissues and to remove wastes