To cross the synapse requires the actions of found at the tips of axons.

1.cell bodies
2.dendrites
3.neurotransmitters
4.none of the above

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated