Which one of the following statements are wrong?
(a) Leucocytes disintegrate in spleen and liver.
(b) RBC, WBC and blood platelets are produced by the bone marrow.
(c) Neutrophils bring about destruction and detoxification of toxins of protein origin.
(d) Important function of lymphocytes is to produce antibodies.

(a) and (b) only

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(a) and (d) only

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(a) and (c) only

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(b) and (d) only

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Solution

The correct option is C (a) and (c) only
(a) The erythrocytes are disintegrated in the spleen and liver. Intravascular disintegration occurs for the leucocytes.
(b) The red bone marrow has hematopoietic myeloid as well as the lymphoid progenitor stem cells. So, the RBCs, WBCs, and blood platelets are produced by the bone marrow.
(c) Neutrophils are the phagocytic cells. They engulf the pathogen and destroy by the lysosomes.
(d) Lymphocytes, especially B-lymphocytes are responsible for the production of the antibodies against blood-borne pathogens.
Hence, the correct answer is '(a) and (c) only'

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Similar questions

Q. Which ones of the following statements are wrong?
(a) Leucocytes disintegrate in spleen and liver
(b) RBC, WBC and blood platelets are produced by bone marrow
(c) Neutrophils bring about destruction and detoxification of toxins of protein origin
(d) Important function of lymphocytes is to produce antibodies.

Q. Assertion :Of all the leucocytes only neutrophils are chemotaxic. Reason: WBCs are chemotaxic as they have to locate and synthesize the antibodies.

Given below are certain structure, write their chief functional activity.
(a) Blood platelets
(b) Neutrophils
(c) Erythrocytes
(d) Lymphocytes
(e) Bone marrow

Which of the following metals are produced by the electrolysis of their molten compounds ?
A. Copper
B. Silver
C. Aluminium
D. Sodium

(a) A and B
(b) B and C
(c) C and D
(d) only D

Q. Read the following differences between lymph and blood.

	Lymph	Blood
(i)	It consists of plasma and leucocytes only.	It consists of plasma, leucocytes, erythrocytes and platelets only.
(ii)	The concentration of glucose is higher in lymph.	The concentration of glucose is less in blood.
(iii)	Amount of metabolic wastes is normal.	Amount of metabolic wastes is much more.
(iv)	Its plasma has fewer proteins, calcium and phosphorus.	Its plasma has more proteins, calcium and phosphorus.

Which of these differences is/are incorrect?

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