Low levels of Serotonin, many doctors have found that patients with low levels of Serotonin suffered from depression. Serotonin can affect moods, which can lead to disorders.
The correct answer is <span>A. eccentric muscle loading and concentric contraction
It involves eccentric muscle loading which is followed by powerful and explosive concentric contractions.</span>
The endocrine system consists of several glands, including the pituitary gland and hypothalamus in the brain, adrenal glands in the kidneys, and thyroid in the neck, as well as the pancreas, ovaries and testes. The stomach, liver and intestines also secrete hormones related to digestion.
Answer: The first one, to keep the blood flowing in only one direction
