7The [BLANK] cell's function is to send electrical impulses around the body.

nerve

Explanation:

Your neurons carry messages in the form of electrical signals called nerve impulses. ... Over half of all the nerve cells in your nervous system do not transmit any impulses. These supporting nerve cells are located between and around your neurons to insulate, protect and nourish them.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.