Tag: evs

Questions Related to evs

Which of the following is related to leucocytes?

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

  1. They undergo diapedesis or squeeze through capillary walls

  2. Sudden fall in number indicates cancer

  3. Produced in thymus

  4. Enucleate

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Correct Option: A
Explanation:
A. Leucocytes or White blood cells (WBCs) can squeeze out through capillary walls into the tissue and reach the site of injury. This process is known as diapedesis.
B. Sudden fall in number of leucocytes is called leucopenia and this increases the chances of infection. Cancer is caused when the number of leucocytes is increased abnormally and this condition is called leukemia (the cancer of white blood cells).
C. Leucocytes are produced in bone marrow. B cells which are a type of lymphocytes (agranular leucocytes) are also produced in spleen and lymph nodes.
D. Leucocytes contain a nucleus and hence they are nucleated.
Hence, statement A is true.
So, the correct answer is 'They undergo diapedesis or squeeze through capillary walls'.

Find the correct descending order of percentage proportion of leucocytes in human blood

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

  1. NeutrophiIs $\rightarrow$ Basophils $\rightarrow$ Lymphocytes $\rightarrow$ Acidophils $\rightarrow$ Monocytes

  2. Neutrophils $\rightarrow$ Monocytes $\rightarrow$ Lymphocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils

  3. Neutrophils $\rightarrow$ Lymphocytes $\rightarrow$ Monocytes $\rightarrow$ Acidophils $\rightarrow$ Basophils

  4. Neutrophils $\rightarrow$ Acidophils $\rightarrow$ Basophils $\rightarrow$ Lymphocytes $\rightarrow$ Monocytes.

Show answer
Correct Option: C

Which one is agranulocyte?

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

  1. Basophil

  2. Eosinophil

  3. Lymphocyte

  4. Neutrophil

Show answer
Correct Option: C
Explanation:
White blood cells or leucocytes can be granular or agranular depending upon whether they have granules or not.
Granulocytes are granular leucocytes and are of three types:
  • Eosinophils- These cells play important role in immunity and allergic reactions.
  • Basophils- These cells secrete histamine, serotonin and heparin.
  • Neutrophils- These cells perform phagocytosis.
Agranulocytes are non-granular leucocytes and are of two types:
  • Lymphocytes- These cells produce antibodies.
  • Monocytes- These cells are phagocytic.
So, the correct answer is 'Lymphocyte'.

In terms of descending order of percentage proportions of leucocytes in human blood, which one is correct? 

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

  1. Neutrophils $\to$ lymphocytes $\to$ monocytes $\to$ acidophils $\to$ basophils

  2. Neutrophils $\to$ basophils $\to$ lymphocytes $\to$ acidophils monocytes

  3. Neutrophils $\to$ monocytes $\to$ lymphocytes $\to$ acidophils $\to$ basophils

  4. Neutrophils $\to$ acidophils $\to$  basophils $\to$ lymphocytes $\to$ monocytes

Show answer
Correct Option: A
Explanation:
 Cells   Percentage proportion of total leucocyte count  $Cells/mm^3$ of blood
Cells 
Percentage proportion of total leucocyte count
Neutrophils 60-70%   4000-5000 cells/$mm^3$
60-70%
Lymphocytes  20-40%  1500-2500 cells/$mm^3$
Monocytes  2-7%  200-700 cells/$mm^3$
Acidophils  1-5%  70-300 cells/$mm^3$
Basophils 0.5-2.7% 35-150 cells/$mm^3$
0.5-2.7%

Thus, the correct answer is (A).

Vincristin and Vinblastin, the chemical substances that can cure Leukemia, are obtained from __________________.

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

  1. Rauwolfia sepentina

  2. Catharanthus roseus

  3. Witania somnifera

  4. Strychnos nux-vomica

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Correct Option: A

Select the incorrect statements
I. Barr body is an another name for neutrophilis
II. Agranulocytes are formed in the red bone marrow
III. Granulocytes are formed is the spleen and lymph node
IV. Lymphocytes exists as two major types, B and T lymphocytes
The correct option with incorrect statements is

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

  1. I, II and III

  2. Only I

  3. Only III

  4. Only II

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Correct Option: A
Explanation:

I.Barr body is an another name of neutrophilis is false – because Barr body is a inactive X chromosome.

II.Agranulocytes are formed in the red bone marrow – False, because, they are  formed from the bone marrow of the human being

III.Granulocytes are formed in the spleen and lymph node – False, because granulocytes are formed from myeloid stem cells

IV.Lymphocytes exists as two major types, B and T lymphocytes – True.

So, the correct option is ‘I, II and III’.

Which of the following components of blood fights infection?

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

  1. White blood cells

  2. Platelets

  3. Red blood cells

  4. All of these

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Correct Option: A
Explanation:

The white blood cells or leukocytes are the blood components primarily involved in fighting the infection.

So, the correct option is 'White blood cells'.

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

Show answer
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

Show answer
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'.