HISTOLOGY
INTEGUMENTARY SYSTEM SKIN
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Vasodilation
|
|
|
Vasocontriction
|
|
|
Vasospasm
|
|
|
None of the above
|
Detailed explanation-1: -Exposure to cold stimulates cold receptors of the skin which causes cold thermal sensations and stimulation of the sympathetic nervous system. Sympathetic stimulation causes vasoconstriction in skin, arms and legs.
Detailed explanation-2: -When we start to get cold, our blood becomes thicker, which can cause clotting. Clotting can cause problems and is one of the reasons we see more heart attacks and strokes in the days following colder weather. Being cold also affects our body’s ability to fight off infection.
Detailed explanation-3: -Receptors in your skin send signals back to the hypothalamus to modify your core body temperature. The hypothalamus then notifies the brain to start a process called vasoconstriction to combat the cold air that surrounds you. The muscles around your blood vessels tighten to reduce blood flow to your extremities.