Physio E3

Question 1

duration of systole vs diastole

Answer 1

systole –> 1/3 of cycle
diastole –> 2/3 of cycle

(emptying –> @ high pressure
filling –> passive @ low pressure)

Question 2

systemic vs pulmonary blood flow

Answer 2

EQUAL (SV can vary beat to beat)

Question 3

EDV-ESV=

Answer 3

SV

~70 mL at rest

Question 4

SV/EDV=

Answer 4

ejection fraction

~55%

Question 5

all valves closed during

Answer 5

isovolumetric contraction and relaxation

Question 6

major heart sounds occur when

Answer 6

S1 and S2

when valves close and blood becomes turbulent

Question 7

events that occur almost simultaneously with onset of systole

Answer 7

QRS complex
S1
c wave (closure of mitral valve and its bulging momentarily back into the atrial chamber)
closure of mitral valve
rise in ventricular pressure

Question 8

events that occur almost simultaneously with onset of diastole

Answer 8

S2
closure of aortic valve
incisura
drop in ventricular pressure

Question 9

between S1 and S2

Answer 9

heart pumps its stroke volume

Question 10

ventricular systole begins when

Answer 10

mitral valve closes and ends when aortic valve closes

Question 11

normal ventricular pressure for L heart

Answer 11

0-120 mmHg

Question 12

normal aortic pressure for L heart

Answer 12

80-120 mmHg

Question 13

normal atrial pressure for L heart

Answer 13

6-10 mmHg