In a Lake, the Open Sunlit Water with Its Suspended

question 65

Multiple Choice

In a lake, the open sunlit water with its suspended phytoplankton is referred to as which zone?

• A)pelagic
• B)limnetic
• C)littoral
• D)profundal
• E)benthic

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Definitions:

Ion Pumps

Proteins found in the cell membrane that use energy to transfer ions against their concentration gradient, maintaining the internal balance of cells.

Antiporters

Antiporters are proteins that transport two or more ions or molecules in opposite directions across a cell membrane, crucial for maintaining cellular ion balance.

Hypertonic

A term referring to a solution having an osmotic pressure (or solute concentration) greater than that of the solution with which it is compared. Compare with hypotonic and isotonic.

Osmotic Pressure

The pressure that must be exerted on the hypertonic side of a selectively permeable membrane to prevent diffusion of water (by osmosis) from the side containing pure water.