Answer:
Option A is correct
Heart and Blood Vessels are the parts of the circulatory system.
Answer:
We can optimize our physical health by good physical fitness, diseases free adequate sleep and healthy diet.
Answer:
The execution of King Charles I was so historic because an English king had never been executed before.
Explanation:
I looked up the history of King Charles I
Answer
Cortisol
Explanation:
Cortisol or stress hormone is a steroid hormone produced in the adrenal gland( Cortex) .A spike in the levels of this hormone suppresses Serotonin levels in the blood. Serotonin is a neuro- transmitter in the brain for mood regulation and balance of memory., good sleep sexual function.
A spike in the levels in the cortisol level in the blood brings a corresponding decrease in the levels of Serotonin,which therefore leads to mood swings depression and insomnia,anxiety by reducing the receptors for serotonin,and therefore disrupting Endorphins levels in the brain.
Exercises decreases the levels of cortisol in the blood,and boost the levels of serotonin therefore boosting the amount of serotonin in the blood ,thus promoting good mood, reduce depression etc
