Fish in a Marine Environment Must Maintain a Relatively Constant

question 11

Multiple Choice

Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride cells in the gills aid fish in the removal of excess ions?

• A)The chloride cells create a countercurrent system where ions are lost from the body and water is absorbed to dilute other ions (NaCl).
• B)The chloride cells create a countercurrent system where water is lost from the body and chloride ions are absorbed.
• C)The chloride cells actively move ions into the body and water follows by osmosis.
• D)The chloride cells actively remove ions from the body and water follows by osmosis.

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