why do ppl get goosebumps when they're cold?
597618
When you get goosebumps it is b/c your body is trying to keep warm. Your blood vessels contract, which gives you the effect of the bumps on your body and hair raise from arms, neck, i.e. It pulls the skin closer together not by much, causing the above. Also another example of the skin pulling closer together is when a man is cold his package and member shrink to keep warmth. A mans package needs to be about 3 degrees cooler than his core temp of the body to produce good sperm. Help this helps with your board om.
292689
On extremely cold days many birds will roost to conserve heat. If they take to the air they expose their underwings and bodies, and the short insulating feathers under the flight feathers are exposed to the cold air, so they no longer provide adequate insulation.
430213
Goosebumps are a physiological phenomenon inherited from our animal ancestors, which was useful to them but are not of much help to us. Goosebumps are tiny elevations of the skin that resemble the skin of poultry after the feathers have been plucked. (Therefore we could as well call them "turkeybumps" or "duckbumps.") These bumps are caused by a contraction of miniature muscles that are attached to each hair. Each contracting muscle creates a shallow depression on the skin surface, which causes the surrounding area to protrude. The contraction also causes the hair to stand up whenever the body feels cold. In animals with a thick hair coat this rising of hair expands the layer of air that serves as insulation. The thicker the hair layer, the more heat is retained. In people this reaction is useless because we do not have a hair coat, but goosebumps persist nevertheless. \n\n\nIn addition to cold, the hair will also stand up in many animals when they feel threatened--in a cat being attacked by a dog, for example. The elevated hair, together with the arched back and the sideward position the animal often assumes, makes the cat appear bigger in an attempt to make the dog back off. People also tend to experience goosebumps during emotional situations, such as walking down the aisle during their wedding, standing on a podium and listening to a national anthem after winning in sports, or even just watching horror movies on television. Quite often a person may get goosebumps many years after a significant event, just by thinking about the emotions she once experienced, perhaps while listening to the romantic song to which she danced many years ago with the love of her life. \n\nThe reason for all these responses is the subconscious release of a stress hormone called adrenaline. Adrenaline, which in humans is produced in two small beanlike glands that sit atop the kidneys, not only causes the contraction of skin muscles but also influences many other body reactions. In animals, this hormone is released when the animal is cold or facing a stressful situation, preparing the animal for flight-or-fight reaction. In humans, adrenaline is often released when we feel cold or afraid, but also if we are under stress and feel strong emotions, such as anger or excitement. Other signs of adrenaline release include tears, sweaty palms, trembling hands, an increase in blood pressure, a racing heart or the feeling of 'butterflies' in the stomach.
975386
no because ur body is warm.
1159450
goose bumps are triggered by some involuntary nerve signals which could be triggered by heavy sneezing, i get once in a while if the sneezing is quite strong, even i get  blinkers in front of my eyes like floating particles(you might have noticed in  cartoon characters mugged on their heads )
813579
Our bodies remain at a temperature of 37deg celcius for optimum functioning and health. When we are cold our bodies are in danger of loosing that vital heat, so it has developed various methods to stop this from happening.\n\n1) we shiver. This generates heat, as the vibrations of our body cause friction. \n\n2) out body hair stands up on end (goose pimples) to trap air next to our body and form a layer of insulation around us, preventing heat from escaping.\n\nThese two functions are enough to replace any heat lost to the surroundings which have triggered these reactions.\n\nOur boby will remain at 37deg celcius whether we are standing in a steam room or ice box.
619455
The phenomenon is called piloerection, which basically means hair standing up.  It is caused by tiny muscles attached to the roots of the hairs pulling the hairs upright.  \n\nPiloerection is an vestigial reaction, meaining that it served a purpose in the past, but now no longer does.  When we were hairier, it helped keep us warm.  Think of a cat or dog that fluffs up its fur when it is cold.  The upright hair traps air in the fur, which serves as an insulator.  \n\nAnimals also often fluff their fur like this when they are preparing to attack, to make themselves look larger and bulkier, hopefully intimidating their opponent.  That is why you also get goose pimples when you are scared.
966705
they call them goose bumps because you get little bumps all over.  It's when your freezing and just can't get warm.  Or you are overcome with a cold chill.  Next time its snowing, stand outside with a t-shirt and see them magically appear.
210021
human's body temperature is 37 degrees celsius. below it you feel cold and above it you feel hot. Usually if you're above 37 you have a fever, but they asked if you have a fever then why you chill. Simply because the inner body temperature is above 37 and the outside body temperaute (which is usually the skin)below the inner body heat. So that's the reason why we chill.
946297
Do you have anay other symptoms?  Being cold could be something that is totally no big deal, like a change in metabolic processes (ie, how you're digesting and stuff).  Fevers and flu often cause chills.  It could also be heart or kidney-related and somewhat serious.  Talk to your parents if you're seriously freaked out about it.  If the cold is the only symptom though, it's probably nothing to worry about.
181756
Goosebumps are actually when the erector pili muscles contract. If you get chilled, you could sneeze and get goose bumps.
165516
Most of us have a ticklish spot somewhere on our bodies, and it is usually pretty easy to find. For some it's just above the knee, for others it's the back of the neck, and some of us go into fits of laughter if someone grabs our sides. Laughing when another person tickles you is a natural reaction. Scientists have discovered that the feeling experienced when we are tickled causes us to panic and is a natural defense to little creepy crawlers like spiders and bugs. Slight tickles from insects can send a chill through your body letting you know something is crawling on you. \nThat same ticklish feeling sends us into a state of panic and elicits a response of uncontrollable laughter if a person tickles us. It's the moment that you least expect to be tickled and are that causes you to feel extremely uneasy and panicked, which leads to the most intense ticklish feeling. Even if you do know that you are about to be tickled, the fear and unease of someone touching and possibly hurting you causes you to laugh. Some people are so ticklish that they begin laughing even before they are touched. \n\nSo, if someone else's touch can tickle us, why can't we tickle ourselves? Much of the explanation for this question is still unknown, but research has shown that the brain is trained to know what to feel when a person moves or performs any function. We aren't aware of a lot of the sensations generated by our movements. For example, you probably don't pay much attention to your vocal cords when you speak. For the same reason, we can't tickle ourselves. If we grab our sides in an attempt to tickle ourselves, our brain anticipates this contact from the hands and prepares itself for it. By taking away the feeling of unease and panic, the body no longer responds the same as it would if someone else were to tickle us. \n\nBrain scientists at the University College London have pinpointed the cerebellum as the part of the brain that prevents us from self-tickling. The cerebellum is the region located at the base of the brain that monitors our movements. It can distinguish expected sensations from unexpected sensations. An expected sensation would be the amount of pressure your fingers apply to your keyboard while typing. An unexpected sensation would be someone sneaking up behind you and tapping you on the shoulder. While the brain discards the sensation of typing, it pays a lot of attention to someone tapping on your shoulder. The difference in reactions from expected to unexpected is a built-in response that probably developed in early human history to detect predators. \n\nAlthough we are not able to tickle ourselves unassisted, there is a way to trick the brain by using a robot tickler. That's right. With all of the know-how of science and technology, a robot has been designed to allow people to tickle themselves. The same British scientists mentioned above have designed a machine that enables you to tickle yourself by remote control. To use the machine, a person lies on their back with their eyes shut. The robot is located near the person with a piece of soft foam attached to a plastic rod that is controlled by a remote control joystick. When the person activates the rod, the robot will react after a short delay. Even with delays as short as a fifth of a second from the time the person activates the rod until the robot tickled the person's hand, subjects have described the sensation as the same as another person tickling them. So, in a sense, you could tickle yourself with a robotic assistant.
696161
Peripheral blood vessels in those areas constrict in response to the cold, diverting blood to the body's core to keep vital organs warm. That's why you are most susceptible to frost bite in the fingers, nose, ears, and toes.
1100489
Our nerves are essentially long electrical circuits, electricity flows better at lower temperatures, this means that the signals from the receptor sites are sent more frequently and at a higher rate in colder weather. \n Also in warmer weather our bodies tend to go into a relaxed state trying to allow more energy to be given off and generate as much heat.  While the colder weather triggers the body into action to generate heat to prevent freezing.
1087438
When we feel cold or frightened, tiny bumps causing a tingling sensation appear on our skin. Attached to each hair inside the skin is a tiny muscle. When you get scared or feel the cold, messages go shooting off from nerve endings that pick up the cold feeling. In a flash, signals come back to the muscles, and as a result each muscle gets taut. The skin around each hair also gets pulled up. The result is little bumps.
567336
Simple.\n\nIt's your body's involuntary reaction to try and keep itself warm. It's essentially much like when you get goosebumps. The skin around the hair follicles contract to stop heat from escaping. It's very likely to happen to the nipple because of the nipple's many nerve endings and blood vessels. So as the skin contracts, it stiffens, hence your nipples get "hard" when it is cold outside.\n\nIt can also be reaction to sexual arousal.
970477
When cold air hits your face or other exposed skin it can feel as if it is biting or nipping at you.\nNipply on the other hand is something quite different. :)