1. Describe the following processes in healthy animals: nerve conduction, the role of myelin in nerve conduction, and the role of acetylcholine in activating muscle cells, eventually leading to contraction. Please be as detailed as possible and feel free to draw annotated pictures to illustrate the mechanisms. 2. Now, what may cause muscle weakness? Examine all the options in the pathway above that may lead to a physiological state of weakness.

b.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

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