Question 1:

a. what are the three (3) major organs of the nervous system

b. for each organ you have named, describe the function

Brian : Information being sent throughout the body.

Spinal cord: Sends sensory messages.

PNS: connects to the central nervous system

you are right, the answer is a

Explanation:

As the name implies, passive transport is a form of cellular transport in which no energy is expended. Passive transport includes diffusion, diffusion through ion channels, osmosis, and facilitated diffusion, which requires a carrier protein.

Active transport is the movement of materials from areas of lower concentration to areas of higher concentration. Moving materials up their concentration gradient requires a cell to expend energy. Active transport includes endocytosis, exocytosis, and cell membrane pumps, which requires a carrier protein.