AP BIOLOGY

ANIMAL PHYSIOLOGY

GAS EXCHANGE IN DIFFERENT ANIMALS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following combinations about the concentrations of oxygen and carbon dioxide in exhaled air is correct?
A
Oxygen 0%, Carbon dioxide 0.03%
B
Oxygen 0%, Carbon dioxide 4%
C
Oxygen 4%, Carbon dioxide 16%
D
Oxygen 16%, Carbon dioxide 0.03%
Explanation: 

Detailed explanation-1: -The amount of inhaled air contains 21% of oxygen and 0.04% of carbon dioxide, while the air we breathe out contains 16.4% of oxygen and 4.4% of carbon dioxide. This is because our cells use oxygen from the inhaled air to release energy and give out carbon dioxide as a byproduct.

Detailed explanation-2: -In turn, exhaled air contains: nitrogen – 78% oxygen – 17% carbon dioxide – 4%

Detailed explanation-3: -Final answer: the percentage of carbon dioxide present in exhaled air is 4.4%.

Detailed explanation-4: -Complete answer: Exhaled air mainly consists of more amount of carbon dioxide and less oxygen as carbon dioxide is considered as a waste product in the body and thus, the body eliminates it during the process of respiration.

Detailed explanation-5: -The exhaled air contains more carbon dioxide because the carbon dioxide produced during respiration is removed out of the body as the exhaled air during the process of respiration.

There is 1 question to complete.