The Mean Free Path of Molecules in a Gas Is

question 4

Multiple Choice

The mean free path of molecules in a gas is proportional to:

• A)the molecular cross-sectional area
• B)the reciprocal of the molecular cross-sectional area
• C)the root-mean-square molecular speed
• D)the square of the average molecular speed
• E)the molar mass

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Definitions:

Saltatory Conduction

The transmission of a neural impulse along a myelinated neuron; ion activity at one node depolarizes the next node along the axon.

Voltage-Activated

Pertains to ion channels in cell membranes that open or close in response to changes in membrane potential.

Action Potential

A rapid rise and subsequent fall in voltage or membrane potential across a cellular membrane, due to the movement of ions in and out of the neuron.

Voltage-Gated

Refers to a type of ion channel that opens or closes in response to changes in the electrical potential across a cell membrane.