1. If a signaling neuron has an excitatory effect on a target cell, does it increase or decrease the membrane potential of the target cell? Defend your answer. 2. Stars come in different colors...

1. If a signaling neuron has an excitatory effect on a target cell, does it increase or decrease the membrane potential of the target cell? Defend your answer.

2. Stars come in different colors depending on their surface temperatures. But when you look up at a starry night sky, all the stars look like they are the same color. Why?