What's the physiology of a sneeze?
364263
Irritants are bad for your body.  When irritants, like dirt or dust, get into your nose, the sensitive receptors in your nose detect it and expel the irritants.  Also, some of the irritants get stuck in your nose hair or your cilia (which are like smaller nose hairs basically), before they can irritate the more sensitive receptors at the back of your nasal cavity.  The sneeze prevents these irritants from polluting and irritating your lungs, because your lungs have very sensitive receptors that are easily damaged.
5716
Well, a sneeze is about as fast \nas a professional baseball pitcher can throw a fastball. The most \nconservative estimates I found were 150 km per hour or roughly 100 mph. The \nhighest estimate I found came from the JFK Health World Museum in Barrington \nIllinois who claim that a sneeze can go as fast as 85% of the speed of sound \nor approximately 630 miles per hour. This sounds like an unusually high \nestimate and the most likely speed is probably 150km/hr.
419888
hey read these scientific reasons why do people bless them:\n1- when you are sneezing the heart stop within it\n2- the sneeze's speed is 100 km&#92;h\n3- if you are sneezing hard maybe you will broke one rib of your body ribs\n4- if you block the sneeze maybe will happen blood throwback in the neck or the head then that will be your death\n5- if you lift your eyes opened within sneezing maybe they will be out of them place\n6- and for your knowledge :\n   within the sneeze all organ of body stop although the time of the sneeze a second or part of second\nthen if god (Allah ) wants you to live,he will let our organ work after stopped \nquestion to you : if don't believe in spirit what the thing let you live ,think and distinguish you from the animals?
17532
sneezing is for colds not flus!  \nSigns of the flu: \nStomach/digestion problems\nloss of appetite\nlow or high fever\nloss of motivation\nexcessive sleeping
1458
Researchers aren't sure exactly why the sneeze reflex happens, but whatever neurological message tells the eyes to close probably comes from a primitive part of the brain called the medulla oblongata in the brain stem.
498901
It's not. Or more accurately, I'm almost certain it's not. I myself get that when I sneeze hard, it's just body's reflex to the sneeze. I did have lab testes done, and I was 100% fine.
947210
You sneeze because you have something in your nose and your body is trying to get it out.  You don't get it out the first time, or your nose is still irritated.
538672
due to the sudden jerk you get while you sneeze, you automatically make you body tight and then suddenly it becomes loose. thus the blood pressure increases. \nSometimes people feely giddy due to a sudden and big sneeze. this is because, the brain cannot coincide with the blood pressure. thus it happens. but remember this is all just for quite a fraction of a second. \n\nHope it was clear enough.
545364
If you try to stop a sneeze you could rupture a vein in your brain or neck and die.\nIf, by force you keep your eyes open while you sneeze, they could leave their sockets
978088
I was taught a sneeze is like a burp or breaking wind. It's simply ignored, as though it never happened. Of course if the person needs a handkerchief and doesn't seem to have one, then for a close friend, relative, or business associate, you would provide them with your clean, pressed white linen or cotton handkerchief and not expect to receive it back (ever).\n\nBut I like the "you're sooooooo good lookin'" idea. Lol  :c)
673477
Laffin...I am below average....and I have no idea about the sneezing/yawning....except that I do yawn alot most mornings....Lack of sleep?...Boredom?.....or just mere sugestion?....\n:)
263698
oh yeah, it is like your entire body is a sneeze.
1099702
Photic sneeze reflex... guarantees you will never become a hot-shot fighter pilot.\n\nIt has it's advantages though.... ever had a sneeze that almost gets there but stops at the last moment, then fades only to rise again in a moment ot two? Stare at a light bulb and pow! Just tips it over the edge.
309795
It is the strain of sneeze.
439582
It is said that all bodily functions stop when you sneeze... save the actual sneezing function itself. \n\nDon't know if this really answers your question, but it seemed applicable.\n\nHave a good one!\n\n-Jordan
750600
A sneeze is a reflex that you can do even during sleep but considering you are sleeping you yourself won't know that you had sneezed while asleep, perhaps another person around could tell you or perhaps you can keep a recorder running while you are asleep to know. Anyway, if you sneeze while asleep I believe it will be a reasonable cause for you to awake so in that case you sneezed and you know you did but not in a sleeping situation anymore.♥
88528
It is an involuntary reaction.  I wonder if it is to keep our eyes from popping out!  But, really, that's just how our brain directs our bodies during such a complex human action.  Do animals close their eyes when they sneeze too?