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Why do the small hairs on the arms stand up when one gets into a very hot bath just as they do when exposed to cold weather?
Wiki User
∙ 15y ago
Goose bumps are a vestige from the days when humans were covered with hair. When it's hot and you need to cool down, little muscles at the base of each hair relax. Your hair becomes relaxed. Your sweat glands pump out body heat in sweat. Your blood vessels get big to take more heat to the skin to get rid of it. When it's cold, the arrector muscle pulls the hair up. The duct to the sweat glands gets small to conserve heat. Our blood vessels also get small to save heat. Hair standing up doesn't make very good insulation - we don't have enough fur for that. Humans don't have very much hair on their bodies anymore. Millions of years ago, humans probably did. And that hair standing on end helped keep people warmer. Those little muscles we have on the end of each hair still work. They still make goose bumps. Cold is not the only thing that can cause our hair to stand on end. Fear or anger can cause the same reflex. The same is true for other mammals. You'll notice that on a cat or dog. Their fur gets bigger when they're angry or afraid.
Wiki User
∙ 15y ago
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Who does the weather symbol f stand for?
The weather symbol F stands for Fahrenheit or fog.
What does H stand for n a weather map?
Usually 'H' on a weather map indicates an area of High pressure.
What are ways the body cools itself in hot weather and heats itself in cold weather?
In cold weather, the arteries and veins nearer the skin have less blood passing through them and the ones further into the body have more thereby retaining heat. The hairs on most parts of your body also stand up to trap a layer of air for insulation. The body when cold frequenly shivers. This is a bodies way of trying to produce movement which in turn generates blood flow and heat transfer. In warm weather, the opposite happens. Hairs lie down and the arteries and veins nearer the skin fill up thereby letting heat energy conduct radiate out of the body. The body has pours. These secret sweat which acts as a cooling agaent.
What does m stand for on a weather map?
maritime- forms over water;wet
What does PC stand for in weather forecast?
P.C. generaly stands for Partly Cloudy.
What is pili pili?
An arrector pili is any of a group of small muscles attached to hair follicles in mammals, the contraction of which causes the hairs to stand on end.
What is another word for hairs on a dog's back?
when the hairs stand up on a dogs back they are known as Hackles
What is dead hair?
Dead hairs are the hairs that are curly and rough when touched and they stand up and can make your hair really messy.
When was Couldn't Stand the Weather created?
Couldn't Stand the Weather was created in 1984-01.
What type of muscle makes hairs on arm stand on end?
pilierector muscle
Why your hairs stand straight with fear?
It doesn´t always stand straight. (But you are right, most of the time it does) It is weightless, so it flows.
How can a fly stand on a puddle without sinking?
there are micro hairs that are almost water proof
Why do hairs stand up if body temperature is too low?
to keep the body warmer....
On a weather map what does a purple line stand for?
the meaning of lines to stand
Why do the hairs on your arm stand up when they come into contact with a balloon?
static electricity static electricity
What does AWIPS stand for?
It stands for Automatic Weather Incorperated Plcae Society! It has to do with weather!
What does POP stand for in the weather?
probability of precipitation
