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Body Fluids and Circulation

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Formed elements constitute which of the following type of cells?

  1. Erythrocytes

  2. Leucocytes

  3. Platelets

  4. 1 and 2

  5. All of the above


Correct Option: D
Explanation:

Erythrocytes, leucocytes and platelets are collectively called formed elements and they constitute nearly 45 percent of the blood.

Albumins in plasma are responsible for which of the following functions?

  1. Coagulation of blood

  2. Osmotic balance

  3. Defense mechanisms of the body

  4. Inflammatory reactions

  5. None of the above


Correct Option: B
Explanation:

Albumins help in osmotic balance.

O blood can be donated to persons with which of the following type of blood groups?

  1. A

  2. B

  3. AB

  4. O

  5. All of the above


Correct Option: D
Explanation:

O blood can be donated to persons with any other blood group and hence, O group individuals are called universal donors.

Which of the following chambers receive(s) oxygenated blood from the gills/lungs/skin in amphibians and reptiles?

  1. Left atrium

  2. Right atrium

  3. Ventricle

  4. 1 and 2

  5. None of the above


Correct Option: A
Explanation:

In amphibians and reptiles, the left atrium receives oxygenated blood from the gills/lungs/skin.

The heart originates from which of the following germ layers?

  1. Endoderm

  2. Mesoderm

  3. Ectoderm

  4. Neural crest

  5. All of the above


Correct Option: B
Explanation:

Heart, circulatory system and muscles are mesodermal in origin.

Persons with AB group can accept blood from persons with which of the following type of blood groups?

  1. A

  2. B

  3. AB

  4. O

  5. All of the above


Correct Option: E
Explanation:

Persons with AB group can accept blood from persons with AB as well as the other groups of blood. Therefore, such persons are called universal recipients.

When the heart muscle is suddenly damaged by an inadequate blood supply, it is referred to as _________.

  1. heart attack

  2. cardiac arrest

  3. heart failure

  4. all of the above

  5. none of the above


Correct Option: A
Explanation:

When the heart muscle is suddenly damaged by an inadequate blood supply, it is referred to as heart attack.

Which of the following type of animals have a closed circulatory system?

  1. The annelids

  2. The arthropods

  3. The molluscs

  4. Chordates

  5. Both 1 and 4


Correct Option: D
Explanation:

Annelids and chordates have a closed circulatory system.

Parasympathetic neural signals ___________.

  1. decrease the rate of heart beat

  2. increase the rate of heart beat

  3. decrease speed of conduction of action potential

  4. increase the strength of ventricular contraction

  5. 1 and 3


Correct Option: E
Explanation:

Parasympathetic neural signals decrease the rate of heart beat, speed of conduction of action potential and thereby the cardiac output.

Shape of a monocyte nucleus is ________.

  1. biconcave

  2. spherical

  3. bilobed

  4. kidney shaped

  5. monocytes do not have a nucleus


Correct Option: D
Explanation:

A monocyte nucleus is kidney or bean-shaped.

What percentage of humans worldwide possess the Rh antigen on their surface of RBCs?

  1. 50

  2. 60

  3. 70

  4. 80

  5. 100


Correct Option: D
Explanation:

The Rh antigen similar to one present in Rhesus monkeys is observed on the surface of RBCs of majority (nearly 80 percent) of humans.

Fats are absorbed in the lacteals present in the intestinal villi through which of the following fluids?

  1. Blood

  2. Plasma

  3. Serum

  4. Lymph

  5. None of the above


Correct Option: D
Explanation:

Fats are absorbed through lymph in the lacteals present in the intestinal villi.

Eosinophils are associated with which of the following processes?

  1. Clotting of blood

  2. Inflammatory reaction

  3. Allergic reaction

  4. Phagocytic activity

  5. None of the above


Correct Option: C
Explanation:

Eosinophils resist infections and are also associated with allergic reactions.

Which of the following events of cardiac cycle marks the end of the T- wave?

  1. The beginning of the systole

  2. The end of systole

  3. Beginning of the diastole

  4. End of diastole

  5. None of the above


Correct Option: B
Explanation:

The T-wave represents the return of the ventricles from excited to normal state (repolarisation). 

The T-wave represents, which of the following events?

  1. Return of the ventricles from an excited to a normal state.

  2. Depolarisation of the atria.

  3. Depolarisation of the ventricles.

  4. Ventricular contraction.

  5. Excitation of the atria.


Correct Option: A
Explanation:

The T-wave represents the return of the ventricles from an excited to a normal state (repolarisation). The end of the T-wave marks the end of systole.

Which of the following type of cells are agranulocytes?

  1. Basophils

  2. Monocyte

  3. Eosinophil

  4. Neutrophils

  5. None of the above


Correct Option: B
Explanation:

Lymphocytes and monocytes are the agranulocytes.

Individuals with blood group O have _________ antibodies in the plasma.

  1. anti-A

  2. anti-B

  3. anti-A and anti-B

  4. no

  5. None of these


Correct Option: C
Explanation:

Individuals with blood group O have both anti-A and anti-B antibodies in the plasma.

Which of the following orders of percentages of different leucocytes is correct?

  1. Neutrophils > eosinophils > basophils > lymphocytes > monocytes

  2. Neutrophils > eosinophils > lymphocytes > basophils > monocytes

  3. Neutrophils > basophils > lymphocytes > monocytes > eosinophils

  4. Neutrophils > lymphocytes > monocytes > eosinophils > basophils

  5. Neutrophils > eosinophils > lymphocytes > monocytes > basophils


Correct Option: D
Explanation:

Correct Answer: Neutrophils > lymphocytes > monocytes > eosinophils > basophils

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