Section 2 Lecture 4

Question 1

Change in pressure from pulmonary artery to the left atrium:

Answer 1

15 mmHg

Question 2

Change in pressure from aorta to the right atrium:

Answer 2

90 mmHg

Question 3

ventricular filling happens during which phase of the cardiac cycle?

Answer 3

diastolic phase

Question 4

What valves are open and which closed during ventricular filling (diastolic phase)?

Answer 4

The AV valves are open and the semilunar valves are closed

Question 5

How much does each ventricle take in with each filling cycle?

Answer 5

140 ml (cc)

Question 6

T or F? The ventricle fills in a linear fashion during diastole.

Answer 6

F.

Question 7

What valves are open and which closed during ventricular ejection (systolic phase)?

Answer 7

The AV’s valves must be closed and semilunar open

Question 8

Avg SV:

Answer 8

70 cc

Question 9

Ejection fraction for the avg person:

Answer 9

0.5 (70/140)

Question 10

How much blood is typically left in the ventricle after contraction?

Answer 10

70 cc

Question 11

Is there a larger change in pressure during unstressed volumetric change or stressed volumetric change?

Answer 11

stressed (passive tension)

Question 12

What is the first sound heard, the “lub?”

Answer 12

mitral valve closing

Question 13

What is the second sound heard, the “dub?”

Answer 13

aortic valve closing (semilunar)

Question 14

The A-V valve is bw:

Answer 14

the right atrium and right ventricle

Question 15

SV =

Answer 15

EDV - ESV

Question 16

Ejection Fraction =

Answer 16

SV/ EDV

Question 17

initiate IV contraction occurs at this point in the ECG:

Answer 17

R

Question 18

normal systole in an ECG:

Answer 18

Bw beg of R and end of T

Question 19

diastole in an ECG:

Answer 19

T to R (including P) wave

Question 20

the Ap that ignites system is found at this point of the ECG:

Answer 20

P wave

Question 21

Returning to resting state in an ECG:

Answer 21

T wave

Question 22

The only time that the ventricular P is higher than the aortic?

Answer 22

ejection

Question 23

When is atrial P lower than ventricular?

Answer 23

isovolumetric contraction, ejection, and isovolumetric relaxation

Question 24

When is atrial P higher than aortic P?

Answer 24

never

Question 25

The mitral valve closes at the:

Answer 25

end of atrial systole/ beginning of isovoumetric contraction

Question 26

The aortic valve opens at the:

Answer 26

end of isovoumetric contraction/ beginning of ejection

Question 27

The aortic valve closes at the:

Answer 27

end of ejection / beginning of isovolumetric relaxation

Question 28

The mitral valve closes at the:

Answer 28

end of isovolumetric relaxation/ beginning of rapid inflow

Question 29

When is aortic pressure higher than ventricular?

Answer 29

always except for during ejection

Question 30

When do the bicuspid and tricuspid valves close, in terms of pressure gradients?

Answer 30

when the atrial pressure falls below aortic pressure

Question 31

Isovolumetric contraction occurs between these 2 points of the ECG:

Answer 31

R and S

Question 32

Atrial systole occurs bw these 2 points on the ECG:

Answer 32

bw P and R

Question 33

Ejection occurs bw these 2 points on the ECG:

Answer 33

S to after the T wave

Question 34

How much extra volume is pushed into the ventricle with each cycle, what percent of the normal filling stroke?

Answer 34

5-10%

Question 35

What is the beginning of systole initiated by:

Answer 35

R wave

Question 36

Stroke volume is measured bw what two points on the ECG?

Answer 36

S to after the T wave