Which of the following statements are correct?
I. IgM is the first immunoglobulin produced in a primary response to an antigen.
II. IgD protects the body fluids and also stimulates phagocytes and complement system.
III. IgE acts as mediation in allergic response.
IV. IgE protects from inhaled and ingested pathogens thus, protects the body surface.
Codes

Which of the following statements are correct for innate immunity? (I). Bacteria enter through a break in the skin. (II). Resident phagocytic cells engulf the bacteria (III). B-cells are stimulated to produce specific antibodies. (IV). Diapedesis allows new phagocytic leukocytes to invade the infected area. Codes

Which of the following statements are correct? (I) Bone marrow and spleen are primary lymphoid organs. (II) Mucosa Associated lymphoid Tissue (MALT) forms about 50% of the lymphoid tissue (III) MHC are the molecules reponsible for recognition and labelling. (IV) Innate immunity shows primary and secondary response. Codes

Read the following statements about acquired immunity. Which of the following statements are correct ? I. Acquired immunity is a non - specific type of immunity . II. The primary and secondary immune responses are carried out with the help of lymphocytes present in our blood. III. Each antibody molecules has two smll heavy chains and two longer light chains respectively. IV. Cell - mediated immunity is mediated by T - lymphocytes.

Read the following statements about acquired immunity. Which of the following statements are correct ? I. Acquired immunity is a non - specific type of immunity . II. The primary and secondary immune responses are carried out with the help of lymphocytes present in our blood. III. Each antibody molecules has two smll heavy chains and two longer light chains respectively. IV. Cell - mediated immunity is mediated by T - lymphocytes.

Which of the following statements is correct about excretion in earthworm ? (i) Earthworm is mainly ureotelic (ii) Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last open into intestine (iii) Integumentary nephridia, attached to lining of body wall of segment 3 to the last, open on the body surface (iv) Different types of nephridia are basicaly similar in structure (v) Nephridia regulate the volume and composition of body fluids.

Which of the following statements is correct about excretion in earthworm ? (i) Earth is mainly ureotelic (ii) Septal nephridia, present on both sides of intersegmental septa of segment 15 to the last open into intestine (iii) Integumentary nephridia, attached to lining of body wall of segment 3 to the last, open on the body surface (iv) Different types of nephridia are basicaly similar in structure (v) Nephridia regulate the volume and composition of body fluids.

Which of the following statements is INCORRECT? I. Human kidneys can produce urine nearly six times more concentrated than the initial filtrate formed. II. An increase in body fluid volume can switch on the osmoreceptors and stimulate ADH. III. Substance like glucose, amino acids, Na^+ , etc., in the filtrate, are reabsorbed actively by the renal tubule whereas the nitrogenous wastes are absorbed by passive transport IV. Each kidney has nearly one million complex tubular structures called nephrons which are the functional units.

Which of the following statements is INCORRECT? I. Human kidneys can produce urine nearly six times more concentrated than the initial filtrate formed. II. An increase in body fluid volume can switch on the osmoreceptors and stimulate ADH. III. Substance like glucose, amino acids, Na^+ , etc., in the filtrate, are reabsorbed actively by the renal tubule whereas the nitrogenous wastes are absorbed by passive transport IV. Each kidney has nearly one million complex tubular structures called nephrons which are the functional units.