Witch macromolecules give the body the energy it needs to carry out cell functions?

The nervous system interacts with the endocrine system by a. using hormones as connections b. sending nerve impulses directly to glands c. using neuroendocrine cells as connections d. sending neurotransmitters directly to neurons

Which term describes a normal value for something in the body? a.homeostasis b.set point c.feedback loop d.integration center

Are gametes exactly the same? explain why or why not?