Weegy: When an impulse reaches the end of a neuron, it triggers the release of: neurotransmitters.
User: The most important function of the skin is
A. protection.
B. storing fat.
C. sweating.
D. insulation.
Weegy: The most important function of the skin is protection.
User: Which of the following is true about muscle tone?
A. It increases with age.
B. It describes the relaxing of some muscles.
C. It is responsible for keeping the back and legs straight when you’re relaxed.
D. It decreases as you exercise more.
(More) 
