1. What are the two types of light-sensitive cells in the eyes? How do they differ from each other? 2. Describe how sound waves enter the ear and ultimately cause you to hear. 3. How are action...

1. What are the two types of light-sensitive cells in the eyes? How do they differ from each other?

2. Describe how sound waves enter the ear and ultimately cause you to hear.

3. How are action potentials generated in chemosensory cells?