Author Question: Which of the following gases would diffuse fastest across the alveolar-capillary membrane? a. Air ... (Read 65 times)

Frost2351

  • Hero Member
  • *****
  • Posts: 557
Which of the following gases would diffuse fastest across the alveolar-capillary membrane?
 
  a. Air
  b. Carbon dioxide
  c. O2
  d. Nitrogen

Question 2

Assuming a constant FiO2 and carbon dioxide production, which of the following statements is correct?
 
  a. An increased PACO2 will result in and increased PAO2.
  b. Increased FIO2 blows off carbon dioxide.
  c. Increases in alveolar ventilation (VA) decrease the PACO2 and increase the PAO2.
  d. The PAO2 varies proportionally with the PACO2.



Liddy

  • Sr. Member
  • ****
  • Posts: 342
Answer to Question 1

ANS: B
Carbon dioxide diffuses approximately 20 times faster across the alveolar-capillary membrane than does O2, because of its much higher solubility in plasma.

Answer to Question 2

ANS: C
With a constant carbon dioxide production, a decrease in alveolar ventilation (VA) simultaneously raises the PACO2 and lowers the PAO2.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

For a complete list of videos, visit our video library