Tag: respiratory and circulatory system

Questions Related to respiratory and circulatory system

In a healthy adult man, the commonest and smallest type of leucocytes are

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Basophils

  2. Monocytes

  3. Eosinophils

  4. Lymphocytes

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Correct Option: D
Explanation:

Lymphocytes are the smallest leukocytes with a rounded nucleus. They flow through the lymphatic system or fluid and consist of Natural killer cells, B-Lymphocytes and T-lymphocytes and defend the body against pathogens and infections.

So, the correct answer is 'Lymphocytes'

Which statement is true for WBC?

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Non-nudeated

  2. Its deficiency causes cancer

  3. Manufactured only in thymus

  4. Can squeeze through blood capillaries

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Correct Option: D
Explanation:

Lymphocytes a type of WBC or Leukocyte can squeeze through the walls of the capillaries into the interstitial fluid to the site of infection,  or in response to inflamation by a process called as diapedesis.

So, the correct answer is 'Can squeeze through blood capillaries'

A type of white blood cell with a very large nucleus, rich in DNA, and a small amount of clear cytoplasm, is found in the blood. It produces antibodies and is important in defence against disease. Name it. 

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Lymphocyte

  2. Myeloid cell

  3. Fibroblast

  4. Neutrophil

Show answer
Correct Option: A
Explanation:
Lymphocytes are one of several different types of white blood cells. Each type of white blood cell has a specific function, and they all work together to fight illness and disease. White blood cells are an important part of the immune system. The bone marrow constantly produces cells that will become lymphocytes. Some will enter the bloodstream, but most will move through the lymphatic system. The lymphatic system is the group of tissues and organs, like the spleen, tonsils, and lymph nodes, that protect your body from infection.
So the correct option is 'lymphocyte'.

Which blood cells transport oxygen?

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Red

  2. White

  3. Both A and B

  4. None of the above

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Correct Option: A
Explanation:

Erythrocytes or red blood cells (RBC) are the most abundant of all the cells in blood. A healthy adult man has, on an average, 5 millions to 5.5 millions of RBCs per cubic mm of blood. RBCs are formed in the red bone marrow in the adults. RBCs are devoid of nucleus in most of the mammals and are biconcave in shape. They have a red coloured, iron containing complex protein called haemoglobin, hence the colour and name of these cells. These molecules play a significant role in transport of respiratory gases like oxygen and carbon dioxide.

Which one is smallest?

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Eosinophil

  2. Basophil

  3. Neutrophil

  4. Monocyte

Show answer
Correct Option: A
Explanation:

A.Eoisinophil - These cells are 10 - 15 µm in diameter

B.Basophils - They are 14-16 µm in diameter, 

C.Neutrophil – The cells are 12 to 17 µm in diameter

D.Monocyte – The cells are 15 to 30 µm in diameter.

So, the correct option is ‘Eosinophils’.

Migration of phagocytes and other leucocytes towards the place of infection occurs through

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Thromnosis

  2. Diapedesis

  3. Emboly

  4. Phagocytosis

Show answer
Correct Option: B
Explanation:
When a tissue is damaged or any infection occurs the phagocytes and other leucocytes move out of the circulatory system through the intact walls of the capillaries to the site of tissue injury or infection. This phenomenon is called diapedesis. Diapedesis is a part of the innate immune response.
So, the correct answer is 'Diapedesis'.

Choose the correct answer from the alternatives given.
The __ produces white blood cells, which function in __ and __.

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. liver; oxygen transport; defense

  2. lymph nodes; oxygen transport; pH stabilization

  3. bone marrow; housekeeping; defense

  4. bone marrow; PH stabilization; defense

Show answer
Correct Option: C
Explanation:

The bone marrow produces white blood cells which function in housekeeping and defense by fighting against the invading pathogens.

So, the correct option is 'bone marrow; housekeeping; defense'.

Macrophages are derived from 

evs our body- its internal organ system leucocytes body fluids and immune responses respiratory and circulatory system

  1. Basophils

  2. Monocytes

  3. Neutrophils

  4. Eosinophils

Show answer
Correct Option: B
Explanation:

Macrophages are scavenging cells derived from monocytes and are found all over the body. These infiltrate the tissue during an inflammatory response.

So, the correct option is 'Monocytes'.