Tag: respiratory and circulatory system

Questions Related to respiratory and circulatory system

Lymph consists of

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

  1. RBCs, WBCs and plasma

  2. RBCs, proteins and platelets

  3. All components of blood except RBCs and some proteins

  4. WBCs and serum.

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Correct Option: D

Abnormal fall in total count of WBCs in the human blood is called

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

  1. Anaemia

  2. Polycythemia

  3. Leucopenia

  4. Leukaemia

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Correct Option: C
Explanation:
Leucopenia is the decrease in WBCs (white blood cells) in the blood. This increases the chances of infection in body. WBCs are involved in the immunity of body and destroy foreign pathogens and particles. However, the number of WBCs may also decrease due to acute infection and this leads to weak immunity. Leucopenia have further subtypes depending upon which type of leucocytes are decreasing. There are five types of leucocytes in our body, basophils, eosinophils, neutrophils, lymphocytes and monocytes. If there is decrease in count of neutrophils, the condition is known as neutropenia. Most often, leucopenia occurs due to fall in neutrophils cells.
So, the correct answer is 'Leucopenia'.

During fever pyrogens are released by

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

  1. Virus

  2. Bacteria

  3. RBC

  4. WBC.

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Correct Option: D

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.

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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

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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'.