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.

4 0

3 years ago

Remain in the To Scale tab, and keep path visibility on. In the central menu, turn on Gravity Force. Begin a new Planet-Moon sim

Cerrena [4.2K]

Answer:

Moving the bodies closer together increased the gravitational attraction and decreased the orbital period.

Explanation:

edmentum

4 0

3 years ago