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Circulation in Humans

Description: Circulation in Humans
Number of Questions: 10
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Tags: Circulation in Humans Life Processes in Animals Human Body
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_________ in the blood fight(s) against the germs entering the body.

  1. RBCs

  2. WBCs

  3. Platelets

  4. Haemoglobin

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Correct Option: B
Explanation:

WBCs in the blood fight against the germs entering the body.

Veins allow the flow of blood

  1. towards the heart

  2. towards the lungs

  3. away from the heart

  4. away from the lungs

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Correct Option: A
Explanation:

The correct option is (1).

The device used for measuring heart rate is

  1. ammeter

  2. barometer

  3. stethoscope

  4. thermometer

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Correct Option: C
Explanation:

The correct option is (3).

A resting person usually has a pulse rate between

  1. 72 and 80 beats per minute

  2. 62 and 70 beats per minute

  3. 82 and 90 beats per minute

  4. 52 and 60 beats per minute

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Correct Option: A
Explanation:

The correct option is (1).

Which of the following is/are responsible for carrying oxygen throughout the body?

  1. WBCs

  2. RBCs

  3. Plasma

  4. Platelets

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Correct Option: B
Explanation:

The correct option is (2).

How many chambers does a human heart have?

  1. 4

  2. 2

  3. 3

  4. 6

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Correct Option: A
Explanation:

A human heart has four chambers, i.e. two atria and two ventricles.

A blocked artery is caused due to

  1. high cholesterol

  2. hypertension

  3. smoking

  4. All of the above

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Correct Option: D
Explanation:

The correct option is (4).

Which of the following chambers of heart collect blood?

  1. Auricles

  2. Ventricles

  3. Valves

  4. Arteries

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Correct Option: A
Explanation:

The atrium is one of the two blood collection chambers of the heart. It was previously called the auricle, but that name is now used for an appendage of the atrium.

The blood vessels carrying oxygen-rich blood from heart to all parts of the body are called

  1. arteries

  2. veins

  3. venules

  4. ducts

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Correct Option: A
Explanation:

The blood vessels carrying oxygen-rich blood from heart to all parts of the body are called arteries.

Which of the following components of blood help(s) in the formation of a blood clot?

  1. RBCs

  2. Platelets

  3. WBCs

  4. Haemoglobin

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Correct Option: B
Explanation:

Platelets are small colourless disc-shaped cell fragment without a nucleus, found in large numbers in blood and involved in blood clotting.

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