Body fluids: blood, blood groups, coagulation, lymph
- Which of the following statements are correct ?A. Basophils are most abundant cells of the total WBCsB. Basophils secrete histamine, serotonin and heparinC. Basophils are involved in inflammatory responseD. Basophils have kidney shaped nucleusE. Baso… Answer: 4. B and C only Key idea: Recall the properties of basophils. A is wrong: neutrophils are the most abundant WBCs, basophils are the... 1
- Given below are two statements :Statement I :Fatty acids and glycerols cannot be absorbed into the blood.Statement II :Specialized lymphatic capillaries called lacteals carry chylomicrons into lymphatic vessels and ultimately into the blood.In the li… Answer: 2. Both Statement I and Statement II are correct Key idea: Fatty acids and glycerol are insoluble, so they go into lacteals inside c... 1
- Given below are two statements :Statement I :The coagulum is formed of network of threads called thrombins.Statement II :Spleen is the graveyard of erythrocytes.In the light of the above statements, choose the most appropriate answer from the options… Answer: 1. Statement I is incorrect but Statement II is correct Key idea: The clot is made of fibrin, not thrombin. Statement I: the coagulu... 1
- Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins ? Answer: 1. Thrombin Fibrinogen is converted to insoluble fibrin by the enzyme thrombin, which itself is formed from prothrombin by thromboki... 1
- Match the following columns and select the correct option.Column - I | Column - II(a) Eosinophils | (i) Immune response(b) Basophils | (ii) Phagocytosis(c) Neutrophils | (iii) Release histaminase, destructive enzymes(d) Lymphocytes | (iv) Release gra… Answer: 1. (a) (iii), (b) (iv), (c) (ii), (d) (i) Eosinophils: release histaminase and destructive enzymes, (a) - (iii). Basophils: release... 1
- Which of the following gastric cells indirectly help in erythropoiesis ? Answer: 4. Parietal cells Key idea: Parietal (oxyntic) cells secrete HCl and intrinsic factor. Intrinsic factor is needed to absorb vitamin... 1
- Match the items given in Column I with those in Column II and select the correct option given below :Column I | Column IIa. Fibrinogen | i. Osmotic balanceb. Globulin | ii. Blood clottingc. Albumin | iii. Defence mechanism Answer: 4. a-ii b-iii c-i Key idea: Plasma proteins have different roles. Fibrinogen: blood clotting (ii). Globulins: defence, as antibodies... 1
- Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature ?(a) They do not need to reproduce(b) They are somatic cells(c) They do not metabolize(d) All their internal space is available f… Answer: 2. (a), (c) and (d) Key idea: Losing the nucleus suits the RBC for its single job, carrying oxygen. (a) Mature RBCs do not divide, s... 1
- Name the blood cells, whose reduction in number can cause clotting disorder, leading to excessive loss of blood from the body. Answer: 3. Thrombocytes Thrombocytes (platelets) release clotting factors and form the platelet plug at an injury. A fall in their number (t... 1
- Serum differs from blood in Answer: 2. lacking clotting factors Serum is plasma without the clotting factors (fibrinogen and others), or in other words the fluid left a... 1