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Its actually a hormone secreted by your adrenal glands witch is in both of your kidneys. Your adrenal glands create Epinephrine mostly when you are stressed witch makes yo…u react faster. It is also used in EPI pen because Epinephrine narrows your blood vessels and opens airway to the lungs but a little amount of it can kill u. EPI pens contains 0.15 mg - 0.5 mg but it takes about 1 mg to overdose on epinepherine but not everyone overdoses on epinepherine at 1 mg it depends on the person and there conditions. Epinephrine is also known as adrenaline or the 'fight or flight hormone' this is because it is released in response to strong emotions such as anger or fear and increases heart rate, blood pressure, sugar metabolism and muscle strength in order to prepare the body for strenuous activity (to fight or run away!). It has a number of different functions in the body including control of heart rate, blood pressure and the diameter of blood vessels and air passageways. It is also used in medicine to treat a number of conditions such as cardiac arrest and anaphylaxis. Epinephrine = the primary "fight or flight" hormone
The sympathetic (fight or flight) system.
find better definitions I cant find the right answer for it
Pupils widened in response to nervous stimuli from what subdivision of the autonomic nervous system?
Parasympathetic and sympathetic divisions.
Well they are both used in the Autonomic system and Somatic system. Acetylcholine is the neurochemical which stimulates muscles. (I assume you mean NA=Sodium?) when the Acetyl…choline binds with the muscle it causes sodium to diffuse in to the cell and potassium to diffuse out, causing depolarization and an Action Potential to be formed. This ultimately causes the muscle to move.
norepinephrine and acetylcholine
Does the effect of epinephrine mimic the effect of the sympathetic nervous system or the parasympathetic nervous system?
epinephrine (or adrenaline in the UK) mimics the effects of norepinephrine (noradrenaline in UK), so activates the SNS, not the PSNS.
That depends entirely upon the receptor that norepinephrine activates. alpha-1 receptors will induce smooth muscle contraction in response to norepinephrine. This is seen in …blood vessels, splenic capsule, the uterus, the prostate, the radial muslces of the iris, the trigone of the bladder, the ureters, hair folicles, nasal secretion and metaarteriolar sphincter tone, salavary gland secretion, & sweat gland secretion. alpha-2 receptors will act to inhibit smooth muscle contraction in response to norepinephrine. This is seen in the smooth muscle of the gastrointestinal tract. beta-1 receptors stimulation by norepinephrine results in cardiac muscle (myocardium) contraction when stimulated by norepinephrine. This activity is seen in the heart; however, these receptors are also noted in the kidney with renin secretion. beta-2 receptors will relax smooth muscle with activated by norepinephrine. This is seen with bronchial dilation, cilliary muscle dilation in the eye, detrussor muscle relaxation, blood vessel dilation, & uterine dilation.
The principal neurotransmitters in ANS synapses are acetylcholine and norepinephrine.
It has about a 4 minute half life.
Serve as transmitters for sympathetic nervous system
it's a hormone when it is produced by the adrenal gland and a nuerotransmitter when it is secreted by a nueron.
This hormone is released during stress by adrenal medulla. This hormone gears up your body for fight or flight response.