Tag: respiratory and circulatory system

Questions Related to respiratory and circulatory system

Which is the correct sequence of arrangement of types of WBC in decreasing order in terms of number per ${mm}^{3}$ of human blood?

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

  1. Eosinophils --> Basophils --> Neutrophils

  2. Basophils --> Eosinophils --> Neutrophils

  3. Neutrophils --> Eosinophils --> Basophils

  4. Eosinophils --> Neutrophils --> Basophils

Show answer
Correct Option: C
Explanation:

Percentage distribution of leukocyte are as follows:

Neutrophils- 60 - 70%
Lymphocytes- 20 - 30%
Monocytes- 2 - 8%
Eosinophils- 1 - 4%
Basophils- 0.5 - 1%
Thus, the correct answer is option C.

Which blood cells of mammals are concerned with immunity?

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

  1. Young Erythrocytes

  2. Leucocytes

  3. Thrombocytes

  4. Matured Erythrocytes

Show answer
Correct Option: B
Explanation:

Leucocytes or the white blood cells are concerned with immunity. They perform phagocytosis, antigen-presenting, the release of antibodies, release of cytokines, opsonization etc. to keep the immunity of the body against the pathogens. Erythrocytes or the red blood cells are responsible for the transportation of oxygen. Thrombocytes or the platelets are responsible for blood clotting.

Hence, the correct answer is 'Leucocytes'.

WBC is called as true cell because of

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

  1. Presence of nucleus

  2. Phagocytosis

  3. Polymorphism

  4. None of the above

Show answer
Correct Option: A
Explanation:

The components of blood consists of red blood cells, white blood cells and platelets. Of these, only white blood cells are true cells or complete cells as they have a nucleus, organelles and other cell structures and processes such as expressing proteins.
Thus, the correct answer is option (A).

Diapedesis means.

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

  1. Movement of the food in gut

  2. Formation of W.B.C.

  3. The process by which leucocytes squeeze through thin capillary wall

  4. Formation of R.B.C.

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Correct Option: C

Increase in number of leukocytes beyond normal indicates

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

  1. Anaemia

  2. Infection

  3. Increased defence against pathogen

  4. Non-formation of RBC.

Show answer
Correct Option: B
Explanation:

A high white blood cell(leukocyte) count isn't a specific disease, but it can indicate another problem, such as infection, stress, inflammation, trauma, allergy, or certain diseases. That's why a high white blood cell count usually requires further investigation.


So, the correct answer is 'Infection'.

Number of leucocytes present in one $mm^3$ of blood is

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

  1. 5000-8000

  2. 2000-3000

  3. 8000-13000

  4. 1 million to 1.5 million

Show answer
Correct Option: A
Explanation:
Leucocytes or white blood cells (WBCs) are colourless, nucleated and motile cells of blood.. Their normal count is 5000- 8000 cells per mm3 of blood. WBCs (White blood cells) can be granulocytes or agranulocytes.depending upon whether they have granules or not. Granular leucocytes or granulocytes are acidophils, basophils and neutrophils while agranular leucocytes or agranulocytes are lymphocytes and monocytes. All WBCs are capable of amoeboid movement with the help of which they are squeezed out of capillaries into the tissues.
So, the correct answer is '5000 - 8000'.

Which is correct about leucocytes?

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

  1. They are red coloured.

  2. They can cross capillaries.

  3. They are enucleate.

  4. Decrease in their number causes leukemia.

Show answer
Correct Option: B
Explanation:
A. Leucocytes are white blood cells (WBCs).
B. They are capable of amoeboid movement due to which they can cross or squeeze out of the capillaries into tissues and this process is known as diapedesis.
C. They are nucleated i.e. they have a nucleus.
D. Increase in their number cause leukemia which is cancer of WBCs.
Hence, only statement B is correct.
So, the correct answer is 'They can cross capillaries'.

Which one produces antibodies?

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

  1. Macrophages

  2. Plasma cells/Lymphocytes

  3. Mast cells

  4. Fibroblasts.

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Correct Option: B

Which one are granulocytes?

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

  1. Neutrophils, basophils, lymphocytes

  2. Eosinophils, basophils, monocytes

  3. Basophils, monocytes, lymphocytes

  4. Neutrophils, eosinophils, basophils

Show answer
Correct Option: D
Explanation:

WBCs (White blood cells) can be granulocytes or agranulocytes.
Granulocytes are of three types:
  • Eosinophils: These cells play important role in immunity and allergic reactions. These make about 1 - 5% of total leucocytes.
  • Basophils: These cells contain heparin, serotonin and histamine. These make about 0.5 - 2.7% of total leucocytes.
  • Neutrophils: These cells perform phagocytosis and also destroy bacteria. These make about 60 - 70% of total leucocytes.
Agranulocytes are of two types:
  • Lymphocytes: These cells are of two types, B lymphocytes that maintain humoral immunity and T lymphocytes which maintain cell mediated immunity. These make about 20 - 40% of total leucocytes.
  • Monocytes: These cells are actively motile and phagocytic cells. These make about 2 - 7% of total leucocytes.
So, the correct answer is 'Neutrophils, eosinophils, basophils'.

Which one is not a WBC?

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

  1. Lymphocyte

  2. Thrombocyte

  3. Monocyte

  4. Basophil.

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Correct Option: B