The Mechanism Whereby Buoyancy Is Achieved in Different Kinds of Fishes

question 28

Multiple Choice

The mechanism whereby buoyancy is achieved in different kinds of fishes is

• A)through the presence of a large,oily liver when a swim bladder is not present.
• B)through the presence of a swim bladder that is kept filled as the fish periodically swims to the surface and gulps air.
• C)through the presence of a swim bladder that is regulated internally by structures that add or remove gas from the bladder by capillary beds.
• D)All of the choices are methods for achieving buoyancy.
• E)None of the choices is correct.

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Definitions:

Pns

Abbreviation for Peripheral Nervous System, which includes nerves and ganglia outside of the brain and spinal cord.

Transient Ischemic Attack

Often called a mini-stroke, a transient episode of neurological dysfunction caused by the loss of blood flow to the brain, spinal cord, or retina, without acute infarction.

Abbreviation

A summarized form of a word or phrase.

Electroencephalogram

A test that measures electrical activity in the brain using electrodes attached to the scalp, used to detect potential problems associated with this activity.