If Extremely Cold Fresh Water Is Added on Top of Seawater

question 22

Multiple Choice

If extremely cold fresh water is added on top of seawater,

• A) the cold water will float at the surface.
• B) the cold water will sink to the bottom and stagnate.
• C) the cold water will sink and move rapidly out of the area.
• D) an overturn will begin immediately.
• E) the wind will control the surface mixing.

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Definitions:

IPSPs

Inhibitory postsynaptic potentials, a kind of synaptic potential that makes a postsynaptic neuron less likely to generate an action potential.

Action Potentials

Rapid, temporary changes in the electrical charge of a cell's membrane, allowing for the transmission of signals along neurons.

Graded Potentials

Changes in membrane potential that vary in size and do not follow the all-or-none principle, important in the initiation of action potentials.

Sodium-Potassium Pump

A vital cell membrane protein that exchanges sodium for potassium across the plasma membrane, critical for cellular functions.