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Punjab 11th Class Biology Circulation Mcqs Test Online

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Question 1 of 13

Biology

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

Heartbeat

Skeletal muscle contraction

Blood pressure

Total cross sectional area of vessels

Question 1 of 13

Question 2 of 13

2. 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 → 1 → 5 → 2 → 4

3 → 5 → 1 → 2 → 4

5 → 3 → 1 → 4 → 2

2 → 3 → 1 → 4 → 5

Question 2 of 13

Question 3 of 13

3. Lymph most closely resembles which of the following?

Blood

Interstitial fluid

Water

Urine

Question 3 of 13

Question 4 of 13

4. During ventricular systole in a mammalian heart the

Atrioventrcular valves open

Aortic pressure decreases

Ventricular pressure increases

Semilunar valves close

Question 4 of 13

Question 5 of 13

5. Bicuspid valve connects

Left atrium and left ventricle

Right atrium and left ventricle

Right atrium and right ventricle

Left atrium and right ventricle

Question 5 of 13

Question 6 of 13

6. Pacemaker is situated in heart

On interventricular septum

On interauricular septum

In the wall of right atrium

In the wall of left atrium

Question 6 of 13

Question 7 of 13

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

A decrease in the length of the systole phase

A decrease in the heartbeat rate

A decrease in the stroke volume

A decrease in the length of the diastole phase

Question 7 of 13

Question 8 of 13

8. Lymph returns …………… to blood

White blood cells

Interstitial fluid

Oxygen

Carbon dioxide

Question 8 of 13

Question 9 of 13

9. What produces systolic blood pressure?

Contraction of the right ventricle

Contraction of the left atrium

Contraction of the right atrium

Contraction of the left ventricle

Question 9 of 13

Question 10 of 13

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

Atrio-ventricular node

Sino-atrial node

Parasympathetic nervous system

Purkinje tissue

Question 10 of 13

Question 11 of 13

11. Human heart is

Neurogenic

Digenic

Myogenic

Cardiogenic

Question 11 of 13

Question 12 of 13

12. The Sino Atrial node (SA node)

Regulates the rate of contraction

Regulates the rhythm of contraction

Is also called AV node

Is also called bundle of His

Question 12 of 13

Question 13 of 13

13. 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 semilunar valves

Closing of bicuspid and tricuspid valves

Question 13 of 13

Test By Subject	Punjab
Test By Topics	11th Class Biology

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