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.

15 ! come and answer! a(n) is the general term for an infectious disease that has spread across a city, region, or country.

Four different thermometers were used to measure the temperature of a sample of pure boiling water. the measurements are recorded in the table below. thermometer temperature reading 1 temperature reading 2 temperature reading 3 w 100.1°c 99.9°c 96.9°c x 100.4°c 102.3°c 101.4°c y 90.0°c 95.2°c 98.6°c z 90.8°c 90.6°c 90.7°c the actual boiling point of pure water is 100.0°c. what can be concluded from the data about the reliability and validity of the thermometers?

The basic types of tissue in the human body are