Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride channels in the gills aid fish in the removal of excess ions?
A. The chloride channels create a
countercurrent system where ions are lost
from the gills and water is absorbed to dilute
other ions (NaCl).
B. The chloride channels create a
countercurrent system where water is lost
from the gills and chloride ions are absorbed.
C. The chloride channels actively move ions
into the gills and water will follow though
osmosis.
D. The chloride channels actively remove
ions from the gills and water will follow
through osmosis.
D
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