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Punjab 11th Class Biology Circulation Mcqs Test Online

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Question 1 of 13

Biology

1. The rhythmic beating of cardiac muscle in the mammalian heart is initiated by the:

Purkinje tissue

Parasympathetic nervous system

Atrio-ventricular node

Sino-atrial node

Question 1 of 13

Question 2 of 13

2. Which of these factors has little effect on blood flow in arteries?

Heartbeat

Total cross sectional area of vessels

Blood pressure

Skeletal muscle contraction

Question 2 of 13

Question 3 of 13

3. The Sino Atrial node (SA node)

Regulates the rhythm of contraction

Is also called AV node

Regulates the rate of contraction

Is also called bundle of His

Question 3 of 13

Question 4 of 13

4. What effect would be caused by cutting the sympathetic nerve fibres to the heart?

A decrease in the heartbeat rate

A decrease in the length of the systole phase

A decrease in the length of the diastole phase

A decrease in the stroke volume

Question 4 of 13

Question 5 of 13

5. A red blood cell, entering the right side of the heart, passes by or through the following structures:
1. atrioventricular valve 2. Semilunar valve
3. Right atrium 4. Right ventricle
5. Sinoatrial node
In which order will the red blood cell passes the structures?

3 → 5 → 1 → 2 → 4

5 → 3 → 1 → 4 → 2

3 → 1 → 5 → 2 → 4

2 → 3 → 1 → 4 → 5

Question 5 of 13

Question 6 of 13

6. Lymph most closely resembles which of the following?

Water

Interstitial fluid

Urine

Blood

Question 6 of 13

Question 7 of 13

7. Pacemaker is situated in heart

In the wall of right atrium

In the wall of left atrium

On interventricular septum

On interauricular septum

Question 7 of 13

Question 8 of 13

8. Lymph returns …………… to blood

Interstitial fluid

Oxygen

Carbon dioxide

White blood cells

Question 8 of 13

Question 9 of 13

9. What produces systolic blood pressure?

Contraction of the left atrium

Contraction of the right atrium

Contraction of the right ventricle

Contraction of the left ventricle

Question 9 of 13

Question 10 of 13

10. Typical lub-dub sounds heard in heart in heartbeat are due to

Blood under pressure through aorta

Closure of bicuspid –tricuspid valves followed by semilunar valves

Closing of bicuspid and tricuspid valves

Closing of semilunar valves

Question 10 of 13

Question 11 of 13

11. Bicuspid valve connects

Right atrium and right ventricle

Left atrium and right ventricle

Left atrium and left ventricle

Right atrium and left ventricle

Question 11 of 13

Question 12 of 13

12. Human heart is

Digenic

Cardiogenic

Neurogenic

Myogenic

Question 12 of 13

Question 13 of 13

13. During ventricular systole in a mammalian heart the

Ventricular pressure increases

Semilunar valves close

Aortic pressure decreases

Atrioventrcular valves open

Question 13 of 13

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Test By Topics	11th Class Biology

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Punjab 11th Class Biology Circulation Mcqs Test Online

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Punjab 11th Class Biology Circulation Mcqs Test Online