Identify at least two substances that would need to move out of a cell to maintain homeostasis.

Ayellow line means traffic on either side may cross the center line to pass another vehicle. a. single solid b. double solid c. single broken d. double broken

What are the main functions of the human skeleton? a exchange of gases b support and movement c sensing the environment d digestion and excretion

Weak stimulus will cause a weak action potential. the stronger the stimulus, the stronger the action potential. a. true b. false