1. why do you think that 100 million sperm are released during ejaculation, if only one sperm is needed to fertilized an egg?
2. how are hormone levels regulated?
3. how does reproductive system, endocrine system, and nervous system works together to maintain healthy body?
4. if you are in a cold are and you start running, how would the control mechanisms in your body responds as you run.
PLEASE ANSWER THANK YOU :))))