Nganong mukurog man ta human ug pangihi?

In medical term, this is the explanation:

According to Dr. R. James Swanson, professor of biological sciences at Old Dominion University explains that “the sympathetic outflow of action potential… would include the release of the adrenal medulla catecholamines epinephrine, norepinephrine and dopamine. When the opportunity arises to allow the parasympathetic side of the ANS to take over, the change in catecholamine production might be the cause of the shiver.” Dr. Swanson adds that, in addition to the shiver, you will also notice a momentary “euphoria” shortly after relaxing the urethral sphincter.

Definition of terms: (Medicinenet.com)

Sympathetic - A part of the nervous system that serves to accelerate the heart rate, constrict blood vessels, and raise blood pressure. The sympathetic nervous system and the parasympathetic nervous system constitute the autonomic nervous system, the branch of the nervous system that performs involuntary functions.

Parasympathetic - A part of nervous system that serves to slow the heart rate, increase the intestinal and gland activity, and relax the sphincter muscles. The parasympathetic nervous system, together with the sympathetic nervous system (that accelerates the heart rate, constricts blood vessels, and raises blood pressure), constitutes the autonomic nervous system.

Adrenal Medulla - The adrenal medulla makes epinephrine (adrenaline) and norepinephrine (noradrenaline). Epinephrine is secreted in response to low blood levels of glucose as well as exercise and stress; it causes the breakdown of the storage product glycogen to the sugar glucose in the liver, facilitates the release of fatty acids from adipose (fat) tissue, causes dilation (widening) of the small arteries within muscle and increases the output of the heart. Norepinephrine secreted by the adrenal gland acts to narrow blood vessels and raise blood pressure.

Catecholamines - Pronounced cat·e·chol·amine. An amine derived from the amino acid tyrosine -- examples include epinephrine (adrenaline), norepinephrine (noradrenaline), and dopamine -- that act as hormones or neurotransmitters.

Epinephrine - A substance produced by the medulla (inside) of the adrenal gland. The name epinephrine was coined in 1898 by the American pharmacologist and physiologic chemist (biochemist) John Jacob Abel who isolated it from the adrenal gland which is located above (epi-) the kidney ("nephros" in Greek). (Abel also crystallized insulin). Technically speaking, epinephrine is a sympathomimetic catecholamine. It causes quickening of the heart beat, strengthens the force of the heart's contraction, opens up the airways (bronchioles) in the lungs and has numerous other effects. The secretion of epinephrine by the adrenal is part of the fight-or-flight reaction. Adrenaline is a synonym of epinephrine and is the official name in the British Pharmacopoeia.

Norepinephrine - both a hormone and a neurotransmitter. As a hormone, secreted by the adrenal gland, it works alongside epinephrine / adrenaline to give the body sudden energy in times of stress, known as the "fight or flight" response. As a neurotransmitter, it passes nerve impulses from one neuron to the next. (bipolar.about.com)

Dopamine - An important neurotransmitter (messenger) in the brain.

Sa binisaya pa:

Kanang mga kemikals sa lawas nga gi hisgutan sa taas, mugna na tungod sa aksyon sa parasympathetic nervous system, mao nang mo-relax ang atong urinary sphincter para maka-ihi kita dayon marag mo-kurog kita gamay (gamay lang). Walay gipili ni, ma babae man o lalaki. Normal kini sa ato. Ambot lang sad ang iro kung mokurog ba (lain na pud ni sya nga istorya).

Ang urinary sphincter mao na ang gapugong sa atong ihi o gate keeper para dili ta maka-ihi sa atong karsones kung bation kita ug kahadlok.

Simple di ba?

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