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The "fight or flight" response is our body's primitive, automatic response that prepares the body to "fight" or "flee" from perceived attack, harm, or threat to survival. When the "fight or flight" response is activated, chemicals like adrenaline and cortisol are released into the blood stream. The rate of respiration increases, blood is redirected from the digestive system into the muscles and limbs; which require extra energy for running and fighting, pupils dilate, awareness intensifies, sight sharpens, impulses quicken, perception of pain diminishes, and immune response intensifies.
The hypothalamus is the main contol center of the autonomic nervous system, and when adrenaline, also called epinephrine is needed, it sends a neural message to the adrenal medulla so it can be released quickly into the blood stream, and since it is a vasoconstrictor, your blood pressure goes up quite rapidly preparing your body for the alarm response which is part of the flight or flight mechanism; part of the sympathetic division of the autonomic system.
by faying anyway
The Stream - 2011 was released on: USA: 2011
Stream - 2008 was released on: USA: February 2008
Mountain Stream A Mountain Stream Background for Your Television - 2008 was released on: USA: November 2008
Adrenaline (epinephrine) is a hormone released from the adrenal glands and its major action, together with noradrenaline, is to prepare the body for fight or flight.
Stream - 2009 was released on: USA: 26 February 2009 (FEARnet)
The Stream of Life - 1919 was released on: USA: October 1919
The secretory system does not really exist. There is a secretory mechanism that is part of the endocrine system, and that secretes hormones into the blood stream.
Yes. It kills almost all diseases which enter into a person's blood stream.