Heart rate is controlled by the two branches of the autonomic (involuntary) nervous system. The sympathetic nervous system (SNS) and the parasympathetic nervous system (PNS). The sympathetic nervous system (SNS) releases the hormones (catecholamines - epinephrine and norepinephrine) to accelerate the heart rate. The parasympathetic nervous system (PNS) releases the hormone acetylcholine to slow the heart rate. Such factors as stress, caffeine, and excitement may temporarily accelerate your heart rate, while meditating or taking slow, deep breaths may help to slow your heart rate.
The first one is to absorb calcium.
second question: I THINK poor wound healing
Answer:
I think its B sense the ice is white it will reflect solar energy
Explanation:
I think it's aeration but I'm not 100% sure though.
Coordination is the working together of various organs of the body of an organism in a proper manner to produce appropriate reaction to a stimulus.
Control is the power of restraining and regulation by which something can be started, slowed down or stopped
