Bird and Fish Respiratory Systems Are Similar in That Both

question 59

Multiple Choice

Bird and fish respiratory systems are similar in that both

• A) employ a countercurrent exchanger.
• B) have air sacs.
• C) function by means of unidirectional flow of the environmental medium over the gas exchange membranes.
• D) consist of infoldings of the body.
• E) involve opercular flaps.

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Definitions:

Optimism

A mindset that tends to expect positive outcomes and focuses on the best possible future.

Mental Health

A level of psychological well-being, or an absence of mental illness.

Physical Health

The overall condition of an individual's body, including the absence of disease and the state of physical fitness.

Negative Reinforcement

The strengthening of a response (increases in frequency) because it is followed by the removal of a (presumably) unpleasant stimulus.