Answer:
This response is activated only by physical threats
First comes non-rem sleep, followed by a shorter period of rem sleep, and then the cycle starts over again
Answer: In one study, exercise stimulated the human brain's ability to maintain old network connections and make new ones that are vital to cognitive health. Other studies have shown that exercise increased the size of a brain structure important to memory and learning, improving spatial memory.
The correct answer among the choices given is option A. Athletes can end up anemic, injured, and chronically sick with colds or the flu if they neglect their protein needs. Athletes require the essential nutrients and minerals the body needs. Studies also has showed that athletes needs more protein in their diet due to their intense training.
