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 effect
Solution
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:
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 effect
Solution
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:
