Which Features Are Required for Efficient External Respiration to Take

question 19

Multiple Choice

Which features are required for efficient external respiration to take place?

• A)The gas exchange region must be moist,thin and have a large surface area.
• B)The gas exchange region must be dry,thin and have a large surface area.
• C)The gases being exchanged must be present in a low concentration in order for diffusion to occur.
• D)Gas exchange can only occur at a temperature lower than the body temperature of the organism.
• E)The gas exchange needs to occur in an aquatic environment in order to be efficient.

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