Also...why do we yawn?
its just very confusing to me.
and i'd like to know.
Answer:
we sneeze to get irritants out of our nose. When you yawn your body is asking for more oxygen. As you get tired you are breathing less and your alveoli gets smaller. Alveoli are the air sacks in your lungs. When you yawn the air rushes into your lungs and all the alveoli sacks pop open to let more oxygen circulate into your bloodstream. Also as an after thought, yawns are contagious. As you yawn watch everyone around you. they will start to yawn also.
To get rid of germs and stretch your jaws? J/K I really don't know...I never thought of this before!
About 25% of people do actually sneeze when exposed to bright lights like the sun. We do not know exactly why this happens, but it might reflect a "crossing" of pathways in the brain, between the normal reflex of the eye in response to light and the sneezing reflex.
The simplest answer is that we don鈥檛 really know
A sneeze is a reflex triggered by sensory stimulation of the membranes in the nose, resulting in a coordinated and forceful expulsion of air through the mouth and nose. A "reflex" means that some type of stimulation of your body causes you to react in a way that is NOT under your control, in other words you do it automatically without thinking and you can鈥檛 even stop it. Your body has many reflexes - the other one important to us here is called the "pupillary light reflex". If you shine a light in your eyes, your pupils get smaller, or constrict. You should be able to see this easily in a friend using a flashlight (or in the mirror
want to know more
http://www.madsci.org/posts/archives/aug...
to sneeze, is to clean out irratents out of our nose.
To yawn, is to show were tired and need sleep.
Saturday, October 31, 2009
Why do we see the color Black When we close our eyes ?
Hello!
I am always wondering that Why do we see the color black while we're closing our eyes ? why not seeing White ... red??
I am feeling stupid for asking this Q ! lol . but anybody have the answer ?
thx
Answer:
Black isn't a colour. You only see it as a colour, because your brain wouldn't like to have holes in your vision, where there is no light reflected. So, to make things more simple, your brains simply tells you, that where there is no light hitting your eyes, you're seeing black. And obviously, when you close your eyes (if it's dark enough), no light will hit your eye.
Put simply, it's just your mind playing tricks on you.. ^-^
it depends if there is light in the room or not. for ex., you see red when u close your eyes in a lit place becuase that is your blood cells
Black is not actually a color. It is a color illusion that we see when there is no light. Black is the absence of light.
I think it is because there is no light in there and your eyes (retina) need light to reflect the color. Same as on a dark night or in a dark room you only see black.
This is my scientific guess from what I've heard on PBS, etc.
I don't. I see a dark, mocha color with diffuse flashes of yellow-orange. Definetly not a uniform color.
yep. as others hava said, it depends on the lighting in the room. if the room is dark, the ul c black. if its like then u might c red...
I am always wondering that Why do we see the color black while we're closing our eyes ? why not seeing White ... red??
I am feeling stupid for asking this Q ! lol . but anybody have the answer ?
thx
Answer:
Black isn't a colour. You only see it as a colour, because your brain wouldn't like to have holes in your vision, where there is no light reflected. So, to make things more simple, your brains simply tells you, that where there is no light hitting your eyes, you're seeing black. And obviously, when you close your eyes (if it's dark enough), no light will hit your eye.
Put simply, it's just your mind playing tricks on you.. ^-^
it depends if there is light in the room or not. for ex., you see red when u close your eyes in a lit place becuase that is your blood cells
Black is not actually a color. It is a color illusion that we see when there is no light. Black is the absence of light.
I think it is because there is no light in there and your eyes (retina) need light to reflect the color. Same as on a dark night or in a dark room you only see black.
This is my scientific guess from what I've heard on PBS, etc.
I don't. I see a dark, mocha color with diffuse flashes of yellow-orange. Definetly not a uniform color.
yep. as others hava said, it depends on the lighting in the room. if the room is dark, the ul c black. if its like then u might c red...
Why do we rub our eyes when we are sleepy?
Answer:
rubbing the eyes relaxes the orbitalis orbitcularis muscle.eventually making it heavy and easier to fall asleep
We are probably trying to rub the sleepiness or feeling of being sleepy out of our eyes. Our eyes are trying to close and we are trying to keep them open.
IDK
irritation and dirt in eyes...your doctor...good luck [ed]
Why do we need to stretch, especially after we wake up from a nights sleep?
Answer:
To make our muscles work again so that we will feel less tired.
I've heard it warms your muscles up by some extent because your muscles are "jerking" in your body.
Ants are the only insects that stretch when they wake up, neat huh? :P
Why do we need to sleep for 8 hours?
Why can't we just sleep for five or six? Why does it have to be eight?
Answer:
The body does all its repairing while we sleep, so we get nicer skin hair, health and everything. Statistics show that people who sleep for exactly eight hours live longer than those who sleep for more or less than that
I have no idea but if dont get a sleep for six and a half..My head starts to pain.
Because 16 hours of work and using your body is enough!
The body and spirit need time to rebuild after the world "beats up on both".
GOD bless us one and all, always.
MBA - Boston Univ.
Not necessary, 5 hr sleep enough, but need to take short naps 5 to10 minutes at least 2 times in the day time to tranquilize the mind and body..
most aduts need only 6hours of sleep 0-7 need 12-14 hours 8-14 need 8hours 15-18 need 8-10hours 19-28 need about 8hour and up to 55 6hours is
Answer:
The body does all its repairing while we sleep, so we get nicer skin hair, health and everything. Statistics show that people who sleep for exactly eight hours live longer than those who sleep for more or less than that
I have no idea but if dont get a sleep for six and a half..My head starts to pain.
Because 16 hours of work and using your body is enough!
The body and spirit need time to rebuild after the world "beats up on both".
GOD bless us one and all, always.
MBA - Boston Univ.
Not necessary, 5 hr sleep enough, but need to take short naps 5 to10 minutes at least 2 times in the day time to tranquilize the mind and body..
most aduts need only 6hours of sleep 0-7 need 12-14 hours 8-14 need 8hours 15-18 need 8-10hours 19-28 need about 8hour and up to 55 6hours is
Why do we hiccup?
how and why do we hiccup?
Answer:
Hiccups Causes
Many conditions are associated with hiccups, but none has been shown to be the cause of hiccups.
If you eat too fast, you can swallow air along with your food and end up with a case of the hiccups.
Any other practices that might irritate the diaphragm such as eating too much (especially fatty foods) or drinking too much (drunk people hiccup) can make you prone to having hiccups.
In these instances, your stomach, which sits underneath and adjacent to the diaphragm, is distended or stretched. Because they occur in relation to eating and drinking, hiccups are sometimes thought to be a reflex to protect you from choking
It is a spasm of the diaphragm.
Its your diaphragm going into spasm. The diaphragm sits below your lungs which is why, if you draw in a deep breath and hold it for as long as you can it stops the spasm.eventually!
actually, it's swallowing too much air. i drink a lot of water to get rid of mine.
When u rush a solid food, like when u take a full spoon, and u take a heavy gulp of a substance, or even laughing 2u much, causes hiccup.
What u have 2 do is 2 drink plenty of water or u hold ur breathe 4 a long period of time (as long as u can).
A hiccup or hiccough (normally pronounced "HICK-up" (IPA: [藞h瑟.k蕦p]) regardless of spelling) is an involuntary spasm of the diaphragm; typically this repeats several times a minute. The sudden rush of air into the lungs causes the epiglottis to close, creating the "hic" listen (help路info) noise. A bout of hiccups generally resolves itself without intervention, although many home remedies are in circulation that claim to shorten the duration, and medication is occasionally necessary. By extension, the term "hiccup" is also used to describe a small and unrepeated aberration in an otherwise consistent pattern. The medical term is singultus.
While many cases develop spontaneously, hiccups are known to develop often in specific situations, such as eating too quickly, taking a cold drink while eating a hot meal, eating very hot or spicy food, laughing vigorously or coughing, drinking an alcoholic beverage to excess, crying out loud (sobbing causes air to enter the stomach), some smoking situations where abnormal inhalation can occur (in tobacco or other smoke like cannabis, perhaps triggered by precursors to coughing, or in the case of cannabis, by precursors to laughter), or electrolyte imbalance. Hiccups may be caused by pressure to the phrenic nerve by other anatomical structures, or rarely by tumors and certain kidney disease. It is reported that 30% of chemotherapy patients suffer singultus as a side effect of treatment. (American Cancer Society)
Purpose
One possible beneficial effect of hiccups is to dislodge foreign pieces of food, which have become stuck in the oesophagus, or which are traveling too slowly. When a piece of food is swallowed that is too large for the natural peristalsis of the esophagus to move the food quickly into the stomach, it applies pressure on the phrenic nerve, invoking the hiccup reflex. This causes the diaphragm to contract, creating a vacuum in the thoracic cavity, which creates a region of low pressure on the side of the lump of food nearest the stomach, and a region of high pressure on the side of the lump of food nearest the mouth. This lungs differential across the food creates a force, which assists peristalsis. In humans, gravity partially assists peristalsis, but in quadrupeds and many marine vertebrates, their oesophagi run roughly perpendicular to the force of gravity, so that gravity provides little assistance. The hiccup mechanism likely evolved as an aid to peristalsis in our ancestors. It only now appears to offer little benefit, as humans are upright and gravity assists peristalsis, making it very unlikely for food to become lodged in the oesophagus.
Ultrasound scans have also shown that fetuses experience hiccups. Some hypotheses suggest that hiccups are a muscle exercise for the respiratory system prior to birth, or that they prevent amniotic fluid from entering the lungs[1]. More research is required to ascertain their true nature, origins, and purpose, if any.
Answer:
Hiccups Causes
Many conditions are associated with hiccups, but none has been shown to be the cause of hiccups.
If you eat too fast, you can swallow air along with your food and end up with a case of the hiccups.
Any other practices that might irritate the diaphragm such as eating too much (especially fatty foods) or drinking too much (drunk people hiccup) can make you prone to having hiccups.
In these instances, your stomach, which sits underneath and adjacent to the diaphragm, is distended or stretched. Because they occur in relation to eating and drinking, hiccups are sometimes thought to be a reflex to protect you from choking
It is a spasm of the diaphragm.
Its your diaphragm going into spasm. The diaphragm sits below your lungs which is why, if you draw in a deep breath and hold it for as long as you can it stops the spasm.eventually!
actually, it's swallowing too much air. i drink a lot of water to get rid of mine.
When u rush a solid food, like when u take a full spoon, and u take a heavy gulp of a substance, or even laughing 2u much, causes hiccup.
What u have 2 do is 2 drink plenty of water or u hold ur breathe 4 a long period of time (as long as u can).
A hiccup or hiccough (normally pronounced "HICK-up" (IPA: [藞h瑟.k蕦p]) regardless of spelling) is an involuntary spasm of the diaphragm; typically this repeats several times a minute. The sudden rush of air into the lungs causes the epiglottis to close, creating the "hic" listen (help路info) noise. A bout of hiccups generally resolves itself without intervention, although many home remedies are in circulation that claim to shorten the duration, and medication is occasionally necessary. By extension, the term "hiccup" is also used to describe a small and unrepeated aberration in an otherwise consistent pattern. The medical term is singultus.
While many cases develop spontaneously, hiccups are known to develop often in specific situations, such as eating too quickly, taking a cold drink while eating a hot meal, eating very hot or spicy food, laughing vigorously or coughing, drinking an alcoholic beverage to excess, crying out loud (sobbing causes air to enter the stomach), some smoking situations where abnormal inhalation can occur (in tobacco or other smoke like cannabis, perhaps triggered by precursors to coughing, or in the case of cannabis, by precursors to laughter), or electrolyte imbalance. Hiccups may be caused by pressure to the phrenic nerve by other anatomical structures, or rarely by tumors and certain kidney disease. It is reported that 30% of chemotherapy patients suffer singultus as a side effect of treatment. (American Cancer Society)
Purpose
One possible beneficial effect of hiccups is to dislodge foreign pieces of food, which have become stuck in the oesophagus, or which are traveling too slowly. When a piece of food is swallowed that is too large for the natural peristalsis of the esophagus to move the food quickly into the stomach, it applies pressure on the phrenic nerve, invoking the hiccup reflex. This causes the diaphragm to contract, creating a vacuum in the thoracic cavity, which creates a region of low pressure on the side of the lump of food nearest the stomach, and a region of high pressure on the side of the lump of food nearest the mouth. This lungs differential across the food creates a force, which assists peristalsis. In humans, gravity partially assists peristalsis, but in quadrupeds and many marine vertebrates, their oesophagi run roughly perpendicular to the force of gravity, so that gravity provides little assistance. The hiccup mechanism likely evolved as an aid to peristalsis in our ancestors. It only now appears to offer little benefit, as humans are upright and gravity assists peristalsis, making it very unlikely for food to become lodged in the oesophagus.
Ultrasound scans have also shown that fetuses experience hiccups. Some hypotheses suggest that hiccups are a muscle exercise for the respiratory system prior to birth, or that they prevent amniotic fluid from entering the lungs[1]. More research is required to ascertain their true nature, origins, and purpose, if any.
Why do we have to pee when we run water, do the dishes etc..??
I mean, i swear its everytime, you have to pee. Its it a reaction in your body, physical, or is it mental, like we have been told thru out the years that if you play in water, your going to pee.
Answer:
This is not a just a natural reaction in your body that's unavoidable. It depends on the person, however, as to whether or not you can train yourself to ignore the urge to go when the water's swishing around or running. Some people have more control over their faculties than others.
Answer:
This is not a just a natural reaction in your body that's unavoidable. It depends on the person, however, as to whether or not you can train yourself to ignore the urge to go when the water's swishing around or running. Some people have more control over their faculties than others.
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