Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Mast cells help in body defence.
Statement 2 :Mast cells phagocytose & destroy microbes
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Solution
Mast cells are large irregular cells with granular cytoplasm,present in the areolar connective tissue. These cells store inflammation producing substances such as histamine in dense granules. Mast cells defend themselves which in turn helps in body defence by attracting phagocytes to the injured tissue.
Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :WBCs accumulate at site of wounds by diapedesis.
Statement 2:It is squeezing of leucocytes from endothelium.
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Solution
In wounds, germs are removed by WBCs accumulation at wound site by diapedesis. It is squeezing of leucocytes out from endothelium of capillaries to tight external agent.
Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Cartilage (protein matrix) and bone (calcium matrix) are rigid connective tissue.
Statement 2 :Blood is connective tissue in which plasma is the matrix.
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Solution
Cartilage comprises of mucopolysaccharide called chondroctin sulphate. Bone is a hard connective tissue.Blood is a fluid connective tissue.
Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Columnar epithelium lining the intestinal mucosa appears to have a brush like appearance.
Statement 2 :A large number of microvilli are present on brush bordered columnar epithelium.
Question contain STATEMENT-1 (Assertion) and STATEMENT-2 (Reason).Each question has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
Statement 1 :Intercalated discs are important regions of cardiac muscle cells.
Statement 2 :Intercalated discs function as boosters for muscle contraction waves.
Which of the following statement about cell junctions is false?
(1)All the cells of the epithelium are held together with little inter cellular materials.
(2)In almost all animal tissues specialized junction provide both structural and functional link between its individual cells.
(3)Tight junctions help to stop substances from leaking across a tissue.
(4)Adhering junctions provide cementing to keep neighbouring cells together.
(5)Gap junctions provide cytoplasmic channels between cells for passage of ions, small molecules and sometimes big molecules.
Which of the following is false about columnar epithelium?
(1)It is made of tall and slender cells.
(2)Free surface may have microvilli.
(3)They are found in stomach and intestine and help in secretion and absorption.
(4)Ciliated epithelium is mainly present in hollow structure like bronchioles and fallopian tubes/ products.
(5)They have apical nuclei.
Covering around bone is called
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Solution
Bone is surrounded by dense, white fibrous sheath called periosteum.
The type of muscles present in our :
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Solution
Thigh muscles are skeletal muscles that are striated and voluntary.
The ciliated columnar epithelial cells in humans are known to occur in :
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Solution
Ciliated epithelium is usually found in the respiratory tract, fallopian tubes.