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What are the hormones secreted by the adrenal medulla? What are their respective functions?
The medullary portion of the adrenals secretes hormones of the catecholamine group: adrenaline (also called as epinephrine) and noradrenaline (also called as norepinephrine). Besides their hormonal function, adrenaline and noradrenaline act as neurotransmitters too. The neurons that use them as neurotransmitters are known as adrenergic neurons.
Adrenaline increases the glycogen breaking into glucose (glycogenolysis) therefore increasing glycemia and the basal metabolic rate of the body. Adrenaline and noradrenaline are released during situations of danger (fightfight or flight response) and they intensify the strength and rate of the heartbeat and selectively modulate the blood irrigation in some tissues by selective vasodilation and selective vasoconstriction. By vasodilation they enhance the blood supply to the brain, the muscles and the heart and by vasoconstriction they decrease the blood supply to the kidneys, the skin and the gastrointestinal tract.
Substances like adrenaline and noradrenaline that promote vasodilation or vasoconstriction are known as vasoactive substances.
Describe about cardiac examination? Physical examination of the cardiovascular system is mainly discussed under four headings i.e., inspection, palpation, percussion and auscul
What is Large Intestine in human biology? Food undigested in the small intestine is passed on by peristalsis into the large intestine, or colon. The intestine is composed of ci
COMPOUN D EPITHELIA (MULTILAYERED EPITHELIA) - These are made up of more than one layer of cells. The compound epithelia may be stratified and transitinal. 1 .
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Q. International Codes used for system of binomial nomenclature? In 1753 Linnaeus suggested a system of binomial nomenclature where each individual is denoted by two epithets,
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Eye Drops Medication is instilled in the form of drops or ointment. Purpose To dilate pupil e.g. Atropine 1 per cent, drosyn 5 per cent or 10 per cent To c
Q. Explain False Positive Tests? As ST depression has been equated with CAD, patients with this finding who have less than a critical coronary narrowing has been called false p
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labelled diagram of male and female cockroach with difference between them
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