If the pleural space lost its negative pressure which of the following would be true?
A.Inspiation would be more difficult
B.Expiration would be more difficult
C.Sufactant wouldnt be needed
D. Exchange of oxygen and carbon dioxide would improve
I think it is would be D but not sure
To determine the correct answer, let's break down the given options and apply our knowledge of the function of the pleural space and negative pressure.
The pleural space is the space between the two layers of pleura (thin membranes) that surround the lungs. The negative pressure within the pleural space is essential for normal lung function. This negative pressure keeps the lungs inflated, allows them to expand during inhalation (inspiration), and aids in the passive recoil of the lungs during exhalation (expiration).
Now let's analyze each option:
A. If the pleural space lost its negative pressure, the lungs would not be able to expand effectively during inspiration. Therefore, inspiration would indeed become more difficult.
B. Similarly, if the negative pressure is lost, the passive recoil of the lungs during expiration would be compromised, making expiration more difficult.
C. Surfactant is a substance that reduces the surface tension in the alveoli (tiny air sacs in the lungs) and helps maintain their stability during breathing. The presence or absence of negative pressure in the pleural space does not have a direct effect on the need for surfactant. Therefore, this option is not directly related to the loss of negative pressure.
D. The exchange of oxygen and carbon dioxide occurs at the alveoli in the lungs, not in the pleural space. Although the loss of negative pressure in the pleural space would impact lung function, it would not directly improve the exchange of oxygen and carbon dioxide.
Based on this analysis, the correct answer is A. Inspiration would be more difficult if the pleural space lost its negative pressure.