Punjab 11th Class Biology Circulation Mcqs Test Online

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Question 1 of 13

Biology

1. Lymph most closely resembles which of the following?

Blood

Urine

Water

Interstitial fluid

Question 1 of 13

Question 2 of 13

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

Total cross sectional area of vessels

Skeletal muscle contraction

Blood pressure

Heartbeat

Question 2 of 13

Question 3 of 13

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

Closing of bicuspid and tricuspid valves

Closure of bicuspid –tricuspid valves followed by semilunar valves

Blood under pressure through aorta

Closing of semilunar valves

Question 3 of 13

Question 4 of 13

4. The Sino Atrial node (SA node)

Regulates the rate of contraction

Regulates the rhythm of contraction

Is also called bundle of His

Is also called AV node

Question 4 of 13

Question 5 of 13

5. Bicuspid valve connects

Right atrium and right ventricle

Left atrium and right ventricle

Right atrium and left ventricle

Left atrium and left ventricle

Question 5 of 13

Question 6 of 13

6. Lymph returns …………… to blood

Carbon dioxide

White blood cells

Interstitial fluid

Oxygen

Question 6 of 13

Question 7 of 13

7. Pacemaker is situated in heart

In the wall of right atrium

On interauricular septum

On interventricular septum

In the wall of left atrium

Question 7 of 13

Question 8 of 13

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

Purkinje tissue

Sino-atrial node

Atrio-ventricular node

Parasympathetic nervous system

Question 8 of 13

Question 9 of 13

9. 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 diastole phase

A decrease in the length of the systole phase

A decrease in the stroke volume

Question 9 of 13

Question 10 of 13

10. Human heart is

Digenic

Neurogenic

Cardiogenic

Myogenic

Question 10 of 13

Question 11 of 13

11. What produces systolic blood pressure?

Contraction of the right ventricle

Contraction of the right atrium

Contraction of the left ventricle

Contraction of the left atrium

Question 11 of 13

Question 12 of 13

12. During ventricular systole in a mammalian heart the

Semilunar valves close

Atrioventrcular valves open

Ventricular pressure increases

Aortic pressure decreases

Question 12 of 13

Question 13 of 13

13. 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

2 → 3 → 1 → 4 → 5

5 → 3 → 1 → 4 → 2

3 → 1 → 5 → 2 → 4

Question 13 of 13

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