【問題1】：Ch49 Nervous System No.47 47) After suffering a stroke, a patient can see objects anywhere in front of him, but pays attention only to objects in his right field of vision. When asked to discribe these objects, he has difficulty judging their size and distance. What part of the brain was likely damaged by the stroke? A) the left frontal lobe B) the right frontal lobe C) the left parietal lobe D) the right parietal lobe Ans: D 【個人看法】： 1. 因為他只對右邊的物體有所反應,因此左腦正常,右腦出問題, A,C選項先刪除 2. 剩下額業和頂葉的判斷, 小弟選的是 B 選項, 因為額葉與判斷有關, 頂葉 記得是主要體感覺區, 因此與答案不同, 麻煩高手指正是否有沒考慮到的地方。 【問題2】: Ch49 Nervous System No.61 61) C.elegans is a model organism and was the first eukaryotic organism to have its genome sequenced. The free-living nematode is often used in labs investigating nervous system development with all 302 of its neurons and their effectors categorized. Interesting control mechanisms have been investigated with reproduction, particularly with egg-laying in the nematode. There are 16 muscles, 2 types of neurons, and multiple receptors involved in the process of laying eggs in C.elegans, and there are mutations in all of those structures for the study of the process. One particular mutation that prevents the laying of eggs by the worm is rescued by the neurotransmitter, serotonin. That rescue suggests that the mutation is most likely in which of the following? A) a post-synaptic neuron involved in egg-laying B) a pre-synaptic neuron involved in egg-laying C) a receptor for serotonin on cells needed for egg-laying D) one of the muscles needed for egg-laying Ans: 這題出現兩次,題目一模一樣,選項也一樣,但給的答案不同,在Ch48第63題答案給A 然而Ch49第61題答案給B 【個人看法】： 依題目所說serotonin為一種neurontransmitter,因此能分泌神傳的細胞 皆有可能, 因此A,B答案都有可能, 突觸前神經元能分泌讓突觸後接收, 也可能是突觸後 神經元分泌讓下面的細胞接收; C選項排除, 因若是receptor壞掉, 加入ligand一樣不會 有反應。個人是選 B 答案, 煩請高手解答, 謝謝。 --

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