Physiologists have answered some of the phenomena that the human body encounters in everyday life, and these answers may surprise you. An inventory of this has been carried out recently on the united states reader's digest website。
Will the feet really grow with age
After years of wear and tear, the muscular and radical cords on the feet may weaken, leading to the flatening of the bow, which means that the legs will grow wider. However, this does not happen to everyone; it is more likely that overweight people, people with swollen feet or ankles, or people with certain diseases, such as diabetes。
Why does it feel like i have a stomach in my throat when i'm on a roller coaster
A lot of people in a roller coaster feel like they're rolling over! When the roller coaster gets to the top, the slowness will increase the torture in a second, and it will suddenly fall, and seat belts will keep your ass in place, but some loosely connected organs will be a little "floating." but there's no need to worry, even the craziest rollers don't damage the internal organs, but the nerve senses movement and makes you feel like your stomach is in your throat。
Why are women more afraid of cold than men
The core parts of women's bodies retain more heat, which helps to maintain the proper functioning of vital organs but does not include limbs. However, when their hands and feet are cold, so are other parts of the body. In addition, studies show that the threshold for women to feel cold is lower than for men. In the same stable cold, women's blood vessels in their fingers are more likely to contract than men。
Do older people really smell
The japanese have invented a term: the smell of age. Researchers at the university of basel, switzerland, examined the odour of a formaldehyde compound (2-acne). The compound is a by-product of decomposition of other chemicals and when the molecule is released from the skin and released into the air, it sends a smell similar to that of grease or grass. Researchers have found that 2-acrylate is the only compound of increasing age and odour. In essence, old age is actually a good genetic quality. For example, some animals can make better reproductive choices by distinguishing between older and younger by the scent。
Why is it so bad
Temperature affects taste, even if you cook the best quality coffee. Belgian researchers found that certain receptors are the most sensitive to food molecules above room temperature. Thus, hot coffee is less bitter and tastes better, because the odor receptors of bitterness are less sensitive。
Why do you wake up in the middle of the night just to pee
This is because complex and sensitive neurons that control colon contraction are also affected by the day and night rhythm of the body. Biological clocks keep you awake during the day and tired at night. Most have no urge to empty their colons in the middle of the night. On the other hand, the bladder keeps an uninterrupted flow of urine out of the kidneys, which accumulates a certain amount of capacity and you need to go to the toilet. Normally, 6-8 hours of sleep do not have to pee, but a disease or drinking too much water before sleeping can keep you up all night。
Why are there prints
Physiologists believe that fingerprints increase friction on the hands of the body, but british researchers have found that the ridges on fingerprints make it more difficult to grab smooth surfaces, such as resin glass, because the ridges on fingerprints reduce skin exposure. In their view, fingerprints can prevent the loss of water at the fingertips, or make the skin more stretchable, thus protecting the skin from harm and preventing the long water herring. Other scientists also believe that fingerprints improve touch. What we know exactly is that each individual's fingerprints are different from others, even the twins。
Can joint pain really predict the weather
Maybe. Changes in air pressure readings may be one of the reasons why weather can predict health: atmospheric pressure usually decreases before the onset of bad weather; this change may lead to an expansion of body tissue, leading to swelling and pain. Although the impact is minor, those suffering from arthritis may be aware of the difference。
Temperatures can also affect. Researchers at the university of tafts in the united states found that for every 10°c decrease in temperature, the degree of pain in the knee arthritis increases slightly。
Why does holding your breath cure hiccups
If you accumulate co2 in your body by not breathing, it will help to stop gills, which cause hiccups. When the muscular muscles fail to contract, they force you to breathe quickly, and then suddenly you are stopped by anorexia. This closure is the cause of hiccups。
Why are the teeth moving
This phenomenon is largely associated with the loss of the bones behind the teeth as they age. If you lose enough bones, the teeth will move。
Why is the stomach grunting
It is the sound of digestive agitation and gastric muscle contraction as they are preparing to digest food. In order to avoid this anachronistic and embarrassing voice, it would be helpful to have fewer meals。
Why are you sulking while running
Forklifts can occur in any type of medium- and high-intensity movement, but most occur when running. One explanation for the epidemic is that, during running, the weight of human organs pulls down the ligature that connects the diaphragm, thereby causing fortitude. In addition, the inverting of organs during the run has put pressure on these fratricidal bands, which can also lead to windfalls. It is medically referred to as “suspensive abdominal pain associated with sport”。
Why does the hare smell worse than the rest
There are two types of sweat glands in the body, most of them on the arm and leg, which are mixed with water and salt. However, an oily substance is released from the sweat under the armpit and groin, and bacteria like it. As a result, bacteria actually ate oily substances to release the stink. In addition, the area of the armpit is more hairy and the surface area in which bacteria and fragments survive makes it more difficult to smell the sweat。
