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2006-10-30 13:30:19 · 7 answers · asked by didi_wah_2006 1 in Science & Mathematics ➔ Biology
When you're scared, excited, embarrased, you get a surge of adrenalin from your adrenal glands, located by your kidneys. This causes blood vessels to dilate so that blood supply can increase....that's why the heartbeat increases and blood vessels near the skin dilate, thus the blushing.
2006-10-30 13:33:25 · answer #1 · answered by macjetsfan 3 · 0⤊ 0⤋
Scared: the "fight or flight reaction" causes the adrenal cortex to spill out epinephrine, a hormone exuded directly into the bloodstream. The affect on the heart is to increase the heart rate.
Blushing: secondary to many factors all of which manifest themselves in arterial dilation; a type of epinephrine,similar to the discussion above, is exuded when embarrassed, say, the arterioles in the face expand, and the face reddens. Note thought that the heart is likely increasing in beats per minute and you may be sweating (your palms?). In acne rosacea, a disease state, the face appears to blush, but is not caused by epinephrine.
2006-10-30 13:36:45 · answer #2 · answered by kellenraid 6 · 0⤊ 0⤋
The physical reaction to fear is called the "fight or flight" response. "Fight or flight" is an involuntary response, a response that a person cannot control consciously but that is controlled by the body's nervous system*. It is the body's way of preparing to run from danger or to fight. The heart beats faster, and the blood pressure and breathing rate increase. Oxygen-rich blood rushes to the large muscles of the body, which are tensing to prepare to fight. The pupils of the eyes grow larger to help the eyes scan for danger. Epinephrine*, also called adrenaline (a-DREN-al-in), is released to prepare the body for quick action. Sweat is produced to cool the body.
2006-10-30 13:34:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋
because your brain releases adrenaline to your blood, this reaches the liver, and trough a series of steps that involve G-proteins, the liver releases glucose to the blood. Once there, the heart pumps faster to carry the glucose all over the body. The face has a lot of blood vessels, so any increase in the amount of blood will be more notorious in you face.
2006-10-30 13:42:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋
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2016-10-16 13:51:10 · answer #5 · answered by ? 4 · 0⤊ 0⤋
It's called "anxiety" or being "anxious" when your heart beats fast and you blush. Learn to deep breath and relax and this will help you to overcome the feelings.
2006-10-30 13:33:54 · answer #6 · answered by jammer 6 · 0⤊ 0⤋
It is your brain activating the fight or flight reflex in the autonomic nervous system.
2006-10-30 13:34:41 · answer #7 · answered by reesie271 4 · 0⤊ 0⤋