SCIENCE
NERVOUS SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Being very excited about a new bike.
|
|
|
Jumping into a cold shower.
|
|
|
Running really fast.
|
|
|
None of the above
|
Detailed explanation-1: -Cold water stimulates the production of noradrenaline and beta-endorphins. Electrical impulses are sent from our nerve endings to our brain when we take cold showers, and this chemical reaction may have an antidepressant effect on some individuals.
Detailed explanation-2: -When you’re suddenly immersed in cold water, your body reacts involuntarily. It can cause blood vessels in your skin to close making it harder for blood to flow around the body. Your heart then has to work harder and your blood pressure increases. In the worst cases you could even have a heart attack.
Detailed explanation-3: -Cold water also appears to activate the sympathetic nervous system, the part of the nervous system that governs the fight-or-flight’ response (an automatic physiological reaction to an event that is perceived as dangerous, stressful or frightening).
Detailed explanation-4: -The natural response to icy water hitting your skin is your system flipping the switch to survival mode. The shock brought by cold water puts your circulatory system into overdrive. Your body increases blood flow to warm your core and protect vital organs. At the same time, it constricts circulation near your skin.