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When it is warm outside your blood vessels near the skin dialate to release the heat from your body to maintain homeostasis. The dialation of blood vessels causes an increase in blood flow which causes an increase in your pulse rate.
The pulse is a measure of the heart rate.
an increase in pulse rate
In cases of severe hypothermia, a persons hear rate will start to decrease and their blood pressure will start to drop. In mild conditions of hypothermia, ones heart rate will increase for a while.
When you excercise your body is doing extra work, the heart has to pump more blood to the body tissues so it causes increase in the pulse tate
yes, it can detect, your pulse rate will increase because of the volume of your blood
dehydration, over-hydration, heat stroke, heat exhaustion, hypothermia, hypothermia, hypoglycemia, hyperglycemia, seizures, heart attack, stroke, concussion, hyperadreneline and caffein poisoning.
Adrenaline rushes, stress, exercise, twitching, panic attacks and such are causes of your pulse being high. Your pulse can also increase when you look at someone you love or like, epilepsi etc. etc.
Increases the rate
yes
yes
While actually exercising will cause your pulse rate to increase, when you are fitter your resting rate will be lower than before.