Which One of the Following Is an Important, Mechanical Weathering

question 12

Multiple Choice

Which one of the following is an important, mechanical weathering process for enlarging fractures and extending them deeper into large boulders and bedrock?

• A)eluviation
• B)hydrologic cycling
• C)oxidation
• D)frost wedging

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Definitions:

Hyperpolarization

An increase in a cell's membrane potential, making it more negative inside compared to the outside and further from the threshold that causes action potentials.

Absolute Refractory Period

A period immediately following the stimulation during which a nerve or muscle is unresponsive to further stimulation.

Second Messenger System

A method of cellular signaling where the signal from a first messenger is transferred to a secondary molecule inside the cell to elicit a physiological change.

Protein Kinase

An enzyme that modifies other proteins by chemically adding phosphate groups to them, thereby altering their function.