A Frog Can Absorb Oxygen Through Its Skin and Lungs

question 56

Multiple Choice

A frog can absorb oxygen through its skin and lungs.Which of the following is an advantage of absorbing oxygen through the lungs?

• A)The heart pumps oxygen from the lungs into the bloodstream
• B)Oxygen absorbed in the lungs enters the blood stream
• C)Air in the lungs has a higher concentration of oxygen than air in the atmosphere
• D)Oxygen diffuses across cells more slowly than across the lining of the lungs
• E)Lungs have more surface area than the skin

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