BIOL X u/d2Vle/content/157473/viewContent/1681261/View Feld of Hope B B F Skinne
ID: 203161 • Letter: B
Question
BIOL X u/d2Vle/content/157473/viewContent/1681261/View Feld of Hope B B F Skinner . Psycho ·BE Skinner 1 Operan 14] Atropine (in an extract from the belladonna plant) was used by many Renaissance ladies (like Mona Lisa) as a beauty aid to enlarge their pupils. It acted by relaxing the muscles of the iris that control pupil size. Today, the military uses atropine as the antidote of choice against the lethal nerve gas sarin. You would hypothesize that sarin gas acts as an inhibitor of a) acetylcholine binding to receptors b) acetylcholine breakdown c) acetylcholine release d) Na channel opening e) K channel opening Atropine [5] A 20-acre field of mature belladonna plants in Sicily was subject to gale force winds in late autumn, randomly dispersing seeds downwind. The following spring, botanists sampled belladonna plants from one- acre plots east, northeast and southeast of the original field-none of which had grazing animals. The botanists noted that the plants in the northeastern plot average a higher amount of atropine per plant that from the other locations. Assuming all windblown seeds developed into plants, you would correctly hypothesize that their observation was a consequence of a) coevolution b) natural selection c) the founder effectExplanation / Answer
Answer:
You would hypothesize that Sarin gas acts as an inhibitor of:
Answer: b) acetylcholine breakdown (Explanation: Sarin gas is a potent irreversible inhibitor of acetylcholinestrase enzyme that metabolizes or breakdown acetylcholine. Therefore, Sarin exposure would lead to inhibition of acetylcholinestrase enzyme causing reduction or blocking of acetylcholine breakdown. This increases the intracellular concentration of acetylcholine in the cells and excessive activation of the post-synaptic acetylcholine receptors.)
2) Assuming all windblown seeds developed into plants,you would correctly hypothesize that their observation was a consequence of:
3) Following an action potential, if ATP is no longer available in the axon of a nerve, you would predict that:
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