Which of the following statements are incorrect ?
(i) Leucocytes disintegrate in spleen and liver
(ii) RBCs, WBCs and blood platelets are produced by bone narrow
(iii) Neutrophils bring about destruction and detoxification of toxins of proteins origin
(iv) Important function of lymphocytes is to produce antibodies.
Answers
Explanation:
ANSWER
(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'
BIOLOGY
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.
December 27, 2019avatar
Deepanshu Ravi
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ANSWER
(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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