why do people suffering from severe emphysema can only walk a few min. before having to stop?

Question

explain using gas exchange and cardiovascular systems

Answer 1

Go and do your own research for your homework!!!

Answer 2

Because Lungs cannot expand enough to achieve an adequate gas exchange. Lugs become rigid and air comes in but cannot go out, and they are rigid because fibrous tissue has replaced the normal lung’s interstitial spaces due chronic inflammatory process. Also certain enzymes activated during inflammation as trypsin and elastase destroy normal lining of alveoli..
After a prolonged period, hyperventilation becomes inadequate to maintain high enough oxygen levels in the blood, and the body compensates by vasoconstricting appropriate vessels. This leads to pulmonary hypertension. This leads to enlargement and increased strain on the right side of the heart, which in turn leads to peripheral edema (swelling of the peripherals) as blood gets backed up in the systemic circulation, causing fluid to leave the circulatory system and accumulate in the tissues.
When you walk your muscles need a higher oxygen pressure, but because cells involved in that process in the lung are destroyed, no adequate levels are reached and the person have to stop.

Answer 3

people suffering from emphysema have poor gas exchange leading to low paO2 levels and thus affecting tissue oxygenation. Therefore their oxygen supply is much less than the demand leading to exhaustion. Their Cardiovascular system also is thus working overtime to compensate for the hypoxemia and thus their excercise tolerance is poor. They are also prone to pulmonary hypertension, systemic hypertension and myocardial dysfunction.

Answer 4

Basically emphysema (COPD - Chronic Obstructive Pulmonary Disease) causes the lungs to become obstructed. When a person with COPD breaths in air their lungs are unable to get as much oxygen into them. Therefore, the blood circulating through them is unable to pick up that oxygen and take it to all the organs and muscles throughout the body. Their muscles tire and require more oxygen more quickly, thereby making the person breath more - becoming short of breath.

Answer 5

The aveoli in the lungs get detroyed irrepairably and basically less oxygen that is in your lungs can go to your blood stream at any one point.

Answer 6

everything in your body needs oxygen to work. If you strain the muscles and organs by working them and can't take in enough oxygen to make them work, you run out of breath quicker. They can't take in enough oxygen

Answer 7

why did you ask this question 5 times