Tag: respiratory and circulatory system

Questions Related to respiratory and circulatory system

Number of WBCs per $mm^3$ of human blood is ideally.

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

  1. $8000$

  2. $7000$

  3. $6500$

  4. $6000$

Show answer
Correct Option: A
Explanation:
White blood cells, or leukocytes, are a part of the immune system. They help our bodies fight infection. White blood cells circulate in the blood so they can be transported to an area that has developed an infection. In normal adult bodies there are 4,000 to 10,000 (average 8,000) white blood cells per microliter of blood. White blood cells are found in blood and lymph, cerebrospinal fluid, lymphatic ganglions, connective tissue, and inflammatory effusions, as they are mobile and migratory. Their average dimension varies between 9 and 18 µm. Normal blood values are about 8000 leukocytes per cubic millimeter. 

So, the correct answer is '8000'.

Number of leucocytes in decreasing order in human blood is?

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

  1. Eosinophils $>$ basophils $>$ neutrophils

  2. Neutrophils $>$ eosinophils $>$ basophils

  3. Basophils $>$ eosinophils $>$ neutrophils

  4. Eosinophils $>$ neutrophils $>$ basophils

Show answer
Correct Option: B
Explanation:

Basophils: 0.5–1.0 percent. Eosinophils: 1–4 percent. Lymphocytes: 20–40 percent. Monocytes: 2–8 percent, Neutrophils: 40% to 60% Lymphocytes: 20% to 40%.


So, the correct answer is 'Neutrophils > eosinophils > basophils'.

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. Neutrophils --> Basophils --> Lymphocytes Acidophils (Eosinophils) -->Monocytes

  2. Monocytes --> Neutrophils --> Lymphocytes --> Acidophils-->Basophils

  3. Neutrophils --> Lymphocytes Monocytes --> Acidophils -->Basophils

  4. Lymphocytes Acidophils --> Basophils --> Neutrophils-->Monocytes

Show answer
Correct Option: C
Explanation:

The relative proportions of the different types of white blood cells are: Neutrophils (roughly 60 – 70%), Lymphocytes (roughly 20 – 30%), Monocytes (approximately 1 – 6%), Eosinophils (approximately 1 – 3%), Basophils (less than 1%).

Thus, the correct answer is 'Neutrophils --> Lymphocytes Monocytes --> Acidophils -->Basophils.'

Compounds released by WBCs, which raise the body's temperature, are known as

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

  1. Insulin

  2. Catecholamines

  3. Pyrogens

  4. Prostaglandins

Show answer
Correct Option: C
Explanation:
When your body temperature rises  because of an infection, it's called a fever.  Fevers are caused by chemicals called pyrogens flowing in the bloodstream. Pyrogens make their way to the hypothalamus in the brain, which is in charge of regulating body temperature. So, the correct option is "C" (Pyrogens).

Immunocomplexes are removed by 

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

  1. Basophils and monocytes

  2. Basophils and eosinophils

  3. Eosinophils and monocytes

  4. Neutrophils and basophils

Show answer
Correct Option: C
Explanation:

Immunocomplexes also called antigen-antibody complexes are harmful and long deposition of then inside the cell can lead to various autoimmune disorders and primarily removed from the cell by phagocytosis in which eosinophils and monocytes (destruction of antibody)  have an important role to play.

So the correct option is 'Eosinophils and monocytes'.

In a blood sample, a WBC has a nucleus with drum-sticks. This indicates that the blood sample has come from a person who is 

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

  1. Heamphilic

  2. Diabatic

  3. Female

  4. Sickle cell-anemic

Show answer
Correct Option: C
Explanation:

Neutrophils are sexually dimorphic. Neutrophils from females exhibit a small additional X chromosome structure, known as a "neutrophil drumstick".

Drumsticks are differentiated from other nuclear appendages that may occasionally be seen in both sexes.  
Drumsticks usually appear when two XX chromosomes are present. The active X chromosome is randomly distributed within nuclear lobes, but the inactive X preferentially appears in drumsticks. Typical drumsticks are rarely seen in normal men. 

So the answer is 'Female'. 

Which of the following cells are associated with immune system of body?

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

  1. Platelets

  2. WBC

  3. Macrophages

  4. RBC

Show answer
Correct Option: B

Select the incorrect statement out of the following. 

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

  1. Neutrophils constitute the majority of leucocytes

  2. Eosinophils resist infection.

  3. Basophils secrete histamine and serotonin.

  4. RBCs in mammals are enucleated and biconvex in shape.

Show answer
Correct Option: D
Explanation:
(A) Neutrophils are the most abundant white blood cell, consisting of $60-70\%$ of the leukocytes, they defend against bacterial or fungal infection. They are referred to as PMN leukocytes.
(B) Eosinophil compose about $2-4\%$ of WBC. The count fluctuates. It rises in response to allergies, parasitic infections, collagen diseases, and disease of the spleen and CNS. That is they resist infection.
(C) Basophils are chiefly responsible for allergic and antigen response by releasing the chemical histamine & serotonin also heparin.
(D) Red Blood cells lack a nucleus, but are biconcave in shape, not Biconvex
All statements are correct, only in (D), there should be biconcave instead of Biconvex.

Mark, among the following the a cell which does not exhibit pahgocytotic activity

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

  1. Monocytes

  2. Neutrophil

  3. Basophil

  4. Macrophage

Show answer
Correct Option: C
Explanation:

Phagocytotic activity is the process of engulfing or ingestion of food or bacteria.

  • Monocytes - They are the largest type of leucocytes present in about 10-20% in blood. They are phagocytotic in nature and engulf bacteria.
  • Neutrophils - There are also many in number in leucocytes. They are phagocytotic in nature and thus engulf harmful bacteria and germs.
  • Basophils - They are present in the very least amount in the leucocytes. Their main function is the prevention of blood clotting and other allergic reactions.
  • Macrophages - They are formed from monocytes in the leucocytes. They are phagocytes that engulf and destroy all the bacteria.

So, the correct option is 'Basophil'.

The blood cells with polymorphic nucleus are?

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

  1. Granulocytes

  2. Thrombocytes

  3. Erythrocytes

  4. None of these

Show answer
Correct Option: A
Explanation:

Granulocytes are a category of white blood cells characterized by the presence of granules in their cytoplasm. They are also called polymorphonuclear leukocytes or polymorphonuclear neutrophils because of the varying shapes of the nucleus, which is usually lobed into three segments. These are granulocytes involved in fighting off pathogens, such as bacteria and fungi.

So the correct answer is 'Granulocytes'.