Question

Which statement is true?
A. Oxygen uptake decreases as the body requires more oxygen and faster removal of carbon dioxide.
B. The exchange of oxygen and carbon dioxide occurs in the bronchioles in the lungs.
C. Oxygen diffuses into the bloodstream because there is a higher concentration of oxygen in the lungs than in the blood flowing into them.
D. The blood that flows into the lungs and past the alveoli is blood that has just circulated around the body and is rich in oxygen.

Answer 1

I believe the correct answer is D. Hope this helped.

Answer 2

Answer:

B. The exchange of oxygen and carbon dioxide occurs in the bronchioles in the lungs.

Explanation:

Bronchioles are the gateways into the lungs and these gateways modifies into tiny air sacs called alveoli in the lungs. The Brionchioles is the site for the exchange of oxygen and carbon dioxide in the lungs. They play a cognizant role in ensuring that air coming into the alveolus reach each one of them.

The alveloli in turn is encapsulated with tiny blood vessles known as capillaries. The capillaries possess thin walls where these oxygen enters into the blood and carbndioxide and water exit the blood.