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Health Forum    Respiratory Diseases
Health Discussion Forum

 What is the home remedy for urine infection, and how does it happen?
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 OK....how is it I get a sore throat....BAM...just like that.....no other symptoms.....?
any suggestion what I can use......?
...


 I have a cough I have never had before...?
I've gone through my fair share of bronchitis, sinus problems, nasal drips, especially since I have been a smoking for about 2 years now. All were causes of excess coughing (usually including ...


 What is it called when you lose your voice when you have a cold.?
The symptoms of the cold are cough, congestion, and runny nose. I am an adult if that matters....


 How to fight cold naturally?
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 I'm afraid of doctors, is there a way to find out if I have asthma?
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 Smoking help?
well my friend just started smoking a few days ago and she is 15 so she wanted me to do it with her and i dont usually give into peer pressure but it look like alot of fun so i tryed the cigg and i ...


 TB testing question?
is there a no- needle TB test avalible?...


 What is shortness of breath?
Is it just that you have to breath deeper? Or does it mean that it's harder to breath?

Like if I go out running and I'm not in shape. And I have to breath deep to get enough ...


 What can help a 3yr old breath through the night without gasping for air?
for 3 months my grandson has been unable to get a good nights sleep because he cannot breath through his nose, he stops breathing the gasps for air after a few seconds,his heart rate is poundind all ...


 PLEASE HELP.....i have been sick since the 22nd. (be serious.)?
it started as a burning feeling in my chest. i said it feel like i was breathing fire. then it turned into a cough. and it has stayed a cough for almost a week and a half. i have NO runny/ stuffed ...


 Does bronchitis cause wheezing?
My one year old just started antibiotics for bronchitis and has been on it yesterday and today. But I noticed today he is wheezing a little bit and I'm concerned it is something more serious....


 Pneumonia?
This is not cool, my back hurts on both sides where my lungs are, chest hurts, allergies have developed as well. (cant breathe through my nose, eyes runny & puffy).

This is my second ...


 Isn't cold out side?
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 I think im having an anxiety attack?
my chest is getting tight,i cant breath well, and i my heart is bouncing all over the place
what should i do???...


 Why is it important to stop smoking before you have a surgical procedure?
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 Sleep apnea?
lately i have been waking up in the morning feeling if i didnt even sleep!
i dont drink caffeine, i make sure my room is dark and all those other things
my mom thinks i might have ...


 My mum is 64 and has a sore throat, a bad cough and an aching jaw, what could it be?
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 How to prove my mom?
okay i recently had a cold, it lasted about 2 weeks.i had a fever a week ago..i would hack up mucous out of my throat..and now im better, im alot better, i can breathe, i dont have a fever, i have ...


 Best climates for a child with chronic asma to live in?
I'm planing to move and i need to know where it is best for my lil girl....



RV RB41 Z
Is breathing voluntary?
i was arguing with me health teacher that breathing was voluntary
but he insists it's involuntary
                     





JERILYN D
You can breathe voluntarily, but it is primarily involuntary (you don't have to think about doing it). If you lose your hypoxic drive (which is what causes you to breathe), then you have to be put on a ventilator - you can't just voluntarily breathe for the rest of your life.


dndrez5
Its involuntary...


Tyler L
Rating
it is involuntary. although you can control it, eventually you do breath. thank about it: are you constantly telling yourself to breathe in, breathe out? no. when you sleep, do you have to wake yourself up to breathe? no. it is involuntary, because you do not have to think about it: you involuntarily do it.


Malik J
Rating
It is both because you can think about breething like when you hold your breath and sometimes you are breething but not thinking about it.


VeeBee
Rating
Your health teacher is correct. Carbon Dioxide level in the blood stream ( not low oxygen level, although that does contribute, but not primarily) ) is the main stimulus to breathe in the normal human body.
Jerylyn is correct about hypoxic drive theory in people with lung disease like copd who are unable to eliminate CO2 and develop a compensatory mechanism, they are known in the field as CO2 retainers, Hypoxic drive is not the main stimulus in normal healthy lungs. Also, folks who are put on ventilators for the most part will come off the ventilator and breathe by themselves again. Remember that many folks in comatose states are breathing by themselves. Here is an excerpt from a nicely written article:
When the body ‘burns’ food the end products are mainly water and carbon dioxide, together with some nitrogenous chemicals such as Urea. The carbon dioxide enters the bloodstream, is carried to the lungs, and is excreted in the expired air of breathing. The atmospheric air we inhale contains virtually no carbon dioxide, whereas there is about 5% in the air we breathe out.

Carbon dioxide reacts in the blood to form carbonic acid and bicarbonate and, if it were allowed to accumulate, would cause acidosis. This condition is particularly harmful to the cells of the brain. Carbon dioxide diffuses into the liquid in the brain, the cerebrospinal fluid (CSF) ; any excess makes it more acid, and this in turn stimulates neural receptors in the brain stem that increase breathing. The result is that the carbon dioxide is blown off in the lungs and the acidity of the blood and brain are kept close to normal levels. Carbon dioxide is the main chemical stimulus to breathing, which is regulated primarily to keep blood and brain acidity at healthy values. If the carbon dioxide in the lungs increases by only 0.2%, from a normal level of about 5%, then breathing is doubled. Breathholding accumulates carbon dioxide in the body, which leads to an irrepressible desire to breathe (lack of oxygen is also a stimulus, but far weaker than carbon dioxide). Conversely, if we voluntarily hyperventilate, the level of carbon dioxide in the blood will decrease, and breathing may be inhibited until more carbon dioxide accumulates. Hyperventilation can have harmful effects because of the pronounced reduction in blood and CSF acidity. Since decreases in carbon dioxide and acidity constrict blood vessels, particularly in the brain, one effect is to reduce the blood supply to the brain.


elfin420
Rating
he is right it's involuntary, you may be able to hold your breath for given amount of time, but it's involuntary, a good example of voluntary would be like arm and leg movements


Apurva
Rating
Breathing is involuntary. Try holding your breath. The reason you can't hold your breath beyond a certain point is not because you are running out of Oxygen, rather it's your brain not letting you do that. You can extend the time you hold your breath by practicing holding your breath. By doing this you are training your brain to allow you to hold your breath longer, but at somepoint you will have to breath. Just look at this this way, people who become unconcious keep breathing; how does that happen? This happens because as long as your brain is working, it will keep you breathing. This is why you are breating when you are asleep. I hope this help. If not yet convinced, you can dig-up a physiology text book for a detailed scientific answer.


s
Rating
it's involuntary, yet controllable at times.


NJ Engineer
It's involuntary. Try holding your breath. Even if you have perfect control and hold it as long as physically possible (don't use any extra devices to stop you from breathing) you will pass out and start breathing again.


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