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L8_Cardiac cycle , Physio

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MCQ

1) Evacuation of the blood from the atria into the ventricles depends mainly on ….…

a- atrial systole phase

b- Isometric contraction phase

c- Ventricular systole phase

d- Ventricular diastole phase

2) The ventricles contract as closed chamber in ……..

a- maximum ejection phase

b- isometric contraction phase

c- rapid filling phase

d- isometric relaxation phase

e- b and d.

3) In isometric relaxation phase, which heart sound can be heard?

a- 1st heart sound

b- 2nd heart sound

c- 3rd heart sound

d- 4th heart sound

4) In maximum ejection phase, A-V valves are ……, while semilunar valves are …..

a- closed, closed

b- closed, opened

c- opened, closed

d- opened, opened

5) Q.R.S wave occurs in …..

a- atrial systole phase

b- isometric contraction phase

c- maximum ejection phase

d- reduced ejection phase

e- isometric relaxation phase

6) Ventricular filling occurs mainly during.….

a- early systole

b- early diastole

c- late systole

d- late diastole

7) In reduced ejection, the ventricular volume is ……..

a- increased

b- decreased

c- not changed.

8) All of these occur during ventricular diastole except ……

a- coronary filling

b- recovery of the ventricles

c- evacuation of the ventricular blood into pulmonary and aortic arteries

d- evacuation of the atrial blood into the ventricles



True and False

1- The duration of cardiac cycle increases when heart rate increases.

2- In isometric contraction phase, aortic and pulmonary pressure show dicrotic wave.

3- When the heart rate increases to 200 beats/minute or more, the COP is reduced.

4- In rapid ejection phase, the amount of the blood entering the aorta is greater than the amount leaving it.

5- The decrease in the duration of cardiac cycle is on expanse of systolic time.

6- The volume of the ventricles is not changed in isometric contraction phase only.

7- When the duration of cardiac cycle decrease, the ratio between systole and diastole will increase.

8- The atrial pressure increases in isometric relaxation phase

Answers:-

MCQ

1_d
2_e
3_b
4_b
5_b
6_b
7_b
8_c
                                                                            
True&False.        

1_T
2_F
3_T
4_T
5_F
6_F
7_T
8_T
















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