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Red blood corpucles
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A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when (a) the sporozoites released from RBCs are being rapidly killed and broken down inside spleen (b) the trophozoites reach maximum growth and give out certain toxins (c) the parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs (d) the microgametocytes and megagametocyte are being destroyed by the WBCs

Study carefully the following stages of life cycle of malarial parasite i.e., Plasmodium. Arrange these stages in the correct sequence and select the correct answer. 1. Sporozoites leave the blood stream and enter the liver cells of man. 2. Sporozoites present in the salivary glands of female Anopheles mosquito are injected into the blood stream of man. 3. The parasite reproduces asexually in RBCs, resulting in bursting of RBCs and causing the cycles of fever, relased parasites infect new RBCs. 4. The parasite reproduces asexually in liver cells, ultimately causing the rupturing of cells. 5. Two types of gametocytes i.e., microgametocytes and macrogametocytes develop in the RBCs. 6. Female Anopheleles mosquito takes up the gametocytes with blood meal of an infected person. 7. Mature infective stage of the parasite i.e., sporozoites escape from intestine and migrate to the mosquito's salivary glands. 8. Fertilisation and developmental stages of the parasite take place in mosquito's stomach.

Substitution of a wrong aminoacid valine instead of glutamic acid in the 6^(th) position of globin chain of RBC causes a disease in man a. Name the disease. b. Draw the amino acid sequence of both normal and diseased Hb.

Which of the following statements are correct regarding secretion oxyntic cells? (i) It denatures proteins and softens fibrous connective tissues in the blood. (ii) It activates rennin. (iii) It has a role in maturation of RBCs. (iv) It activates trypsin.

Mark the odd one in each series: (a) Areolar tissue, blood, neuron, tendon (b) RBC, WBC, platelets, cartilage (c) Exocrine, endocrine, salivary gland, ligament (d) Maxilla, mandible, labrum, antennae (e) Protonema, mesothorax, metathorax, coxa

Which of the given option shows all wrong statements for thyroid gland. (i) It inhibits process of RBC formation ( ii) It helps in maintenance of water and electrolytes (iii) Its more secretion can reduce blood pressure (iv) It stimulates osteoblast

Following are given four statements (i)- (iv) related to frog. Read the statement carefully and select the option that identifies two correct statements. (i) The brain in divided into fore-brain, mid-brain and hind-brain (ii) Vasa efferentia enter the kidneys on their side and open into Bidder's canal (iii) Ear acts as a hearing organ only (iv) RBCs are enucleated and contain red coloured pigment namely haemoglobin