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vasoconstriction is when your blood vessels contract.
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∙ 13y ago
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How stimulant affect an in individual personality and physical characteristic?
typically, most stimulant's induce energy, concentration, and feeling of wellbeing on the mentally positive side. that's because most of stimulant increase the level of nor epinephrine which is responsible for ''fight or flight'' along with increasing the level of dopamine which is responsible for ''pleasure and reward system''. however it also induce huge side effect such as aggression, paranoia, and anxiety after taking excessive amount of it. as i have mentioned earlier due to high level of norepinephrine . on the physical side, it will increase sexuality, vasoconstiction which mean that it will narrow the blood vessels. some of stimulant would also cause pupil dilation. also most of stimulant would increase heart rate. still each stimulant may have different effect than another that's because of chemical deifferances in stimulant that may increase one neurotransmetter higher than another. sources:wikipedia and drugs.com
What is the site of regulation of water balance and body temperature?
Changes in body temp are recognised by the hypothalamus in the brain. An increase in body temp leads to vasodilation of blood vessels and thus more heat radiated from the skin. Also stimulates the production of sweat and thus heat loss by evaporation. A decrease in temp results in vasoconstiction of blood vessels and thus heat retention. Water balance is also recognised by the hypothamus but is controlled by the kidneys. ADH is released from the pituritary gland which increases water reabsorption in the kindeys whilst Aldolsterone is released from the adrenal cortex (gland located above kidney) which increases the absorption of Na+ ions which causes water to follow passively by osmosis.
