Indicate the Direction That the Force in Question Tends to Move

question 15

Short Answer

Indicate the direction that the force in question tends to move the involved ion under the stated conditions by writing the appropriate letter in the blank, using the following answer code:
a.tends to move the involved ion out of the cell
b.tends to move the involved ion into the cell
-Electrical gradient for K⁺ at the peak of an action potential

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Definitions:

Conus Medullaris

The tapered, lower end of the spinal cord, which typically ends around the first lumbar vertebra.

Cervical Enlargement

A region of the spinal cord where nerve fibers that supply the arms and hands are found, noted for its increased diameter.

Cauda Equina

A collection of nerve roots at the lower end of the vertebral canal, resembling a horse's tail.

Filium Terminale

A fibrous tissue extending from the conus medullaris of the spinal cord to the coccyx, providing longitudinal support to the spinal cord.