The Diagram Below Shows the Position of a Long Straight

question 31

Multiple Choice

The diagram below shows the position of a long straight wire perpendicular to the page and a set of directions labeled A through H. When the current in the wire is directed up out of the page, the direction of the magnetic field at point P is

• A) E.
• B) F.
• C) G.
• D) H.
• E) A.

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Definitions:

Nerve Impulse Conduction

The process by which nerve cells (neurons) transmit electrical signals along their axons to communicate with other neurons or muscles.

Myelin Sheath

A fatty layer that surrounds the axons of some neurons, providing electrical insulation and increasing the speed at which nerve impulses are conducted.

Saltatory Conduction

The process by which nerve impulses jump from one Ranvier node to another, speeding up the transmission of electrical signals along myelinated neurons.

Axon Hillock

The cone-shaped region of an axon in a neuron where the axon originates from the cell body.