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WorksheetsCardiac Cycle(1)
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
If one cardiac cycle lasts 0.8 seconds, how many times will the heart beat between 10pm and 11.45pm
a)
7875
b)
131
c)
4500
d)
1650
2.
How many audible sounds are produced during one heartbeat?
a)
2
b)
3
c)
1
d)
4
3.
What cause the heart sounds? (1) closure of semilunar valves (2) closure of atrioventricular valves (3) closure of aorta (4) closure of vena cava (5) contraction of the ventricles
a)
1,2,5
b)
1 and 2 only
c)
2 and 5 only
d)
1, 2, 3, 4
4.
During vigorous exercise, the heartbeats faster. Which part of the cycle will not be affected by the exercise?
a)
frequency of the heart sounds
b)
rate at which blood is pumped into the ventricles
c)
rate at which the ventricles pump out blood
d)
loudness of the heart sounds
5.
During which of the following stage is the atrioventricular valve open?
a)
ventricular systole
b)
atrial systole
c)
ventricular diastole
6.
Which of the following events occur duirng atrial systole?
a)
blood flows into the atria
b)
blood flows out of the atria
c)
blood is pumped out of the atria
d)
atrioventricular valves are slightly open
7.
What causes pressure to rise in the ventricles during atrial diastole?
a)
contraction of the ventricles
b)
relaxation of the ventricles
c)
flow of blood into the ventricles from the atria
d)
contraction of the atrial walls
8.
Ventricular diastole involves the following events except …………….
a)
Movement of blood into the atria
b)
movement of blood through the aorta and pulmonary arteries
c)
production of a heart sound
d)
movement of blood out of the ventricles into the atria
9.
Closure of the semilunar valves results in (1) the first heart sound (2) the second heart sound (3) movement of blood from the left ventricles into the aorta (4) movement of blood from the aorta towards the pulmonary circulation
a)
2 alone
b)
2, 3 and 4
c)
2 and 3 alone
d)
1, 3 and 4
10.
Peak ventricular pressure always occurs during ………………………..
a)
Ventricular systole
b)
Ventricular diastole
c)
Atrial systole
d)
Atrial diastole
11.
Atrioventricular valves will definitely be open during ……………………………
a)
Ventricular systole
b)
Ventricular diastole
c)
Atrial systole
d)
Atrial diastole
12.
Which of the following events cannot occur simultaneously?
a)
Atrial Systole and Ventricular Diastole
b)
Atrial systole and ventricular systole
c)
Atrial systole and closure of atrioventricular valves
d)
Ventricular systole and closure of semilunar valves
13.
In describing the events of ventricular diastole, a student stated that the atria fills up with blood PASSIVELY. Which of the following statements explain his point?
a)
blood is being pumped into the right atria from the vena cava
b)
low pressure of blood in the vena cava causes blood to flow passively into the right atrai
c)
low pressure in the right atria causes blood to flow from the vena cava into the right atria
d)
low pressure of blood in the ventricles causes blood to flow from the ventricles into the atria
14.
Which of the following ensures that blood does not flow in the wrong direction?
a)
closure of atrioventricular valves during ventricular systole
b)
closure of atrioventricular valves during atrial systole
c)
closure of atrioventricular valves during ventricular diastole
d)
closure of atrioventricular valves during atrial diastole
15.
Which of the following best explains why right atrium and the left ventricle cannot contract at the same time?
a)
They are on different sides of the heart
b)
Impulses will be delayed for some milliseconds at the atrioventricular node
c)
The nervous system stimulates the right atrium before stimulating the left ventricle
d)
The left ventricle is thicker than the right atrium
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