Question

43) The nonspecific immunity that protects a person from developing a microbial infection includes all 43) of the following excrr! person from A) acidic secretions B) lymphocytes. Q antimicrobial proteins. D) mucous membranes. E) the skin. 4) In the inflammator from happening? y response, the absence of which of the following would prevent all of the others 44) A) leakage of plasma to the affected area Q dilation of blood vessels D) release of histamine E) increased permeability of blood vessels 45) Which cell and signaling molecule are responsible for initiating an inflammation response? A) dendritic cells: interferon B) phagocytes: chemokines Q) lymphocytes: interferon D) phagocytes: lysozyme E) mast cells: histamine 46) The following events occur when a mammalian immune system first encounters a pathogen. Place1 46) correct sequence and then choose the answer that indicates that I. Pathogen is destroyed IL. Lymphocytes secrete antibodies. II. Antigenic determinants (antigens) from pathogen bind to antigen receptors on lymphocytes. IV. Lymphocytes specific to antigenic determinants (antigens) from pathogen become numerous. V. Only memory cells remain. D) IV, II,III, 1V 47) When oxygen is released as a result of photosynthesis, it is a direct by-product of A) the electron transfer system of photosystem II B) the electron transfer system of photosystem I C chemiosmosis D) splitting water molecules 48) What compound provides the reducing power for Calvin cycle reactions? B) NADPH A) NADP ) ATP D) NADH 49) The membranes of winter wheat are able to remain fluid when it is extremely cold by A) cotransport of glucose and hydrogen B) increasing the percentage of cholesterol molecules in the membrane increasing the percentage of unsaturated phospholipids in the membrane D) decreasing the number of hydrophobic proteins in the membrane

Answer 1

Answer: