Light energy stimulating neurons in the retina is an example of ________

Ca2+ enters the cell when an action potential is generated. Diffusion and electrostatic pressures push Ca2+ into the cell. Ca2+ channels are:

a. passive. b. chemically-gated. c. voltage-gated. d. chemically-gated and voltage-gated.

In the case about Katey that opens Chapter 7 of your text, Katey would often compensate for mood changes by ____ and ____

a. drinking alcohol; working hard b. working hard; vacationing c. complaining; drinking alcohol d. complaining; vacationing