A Teratogen Is A(n)

question 117

Multiple Choice

A teratogen is a(n)

• A)tool used to extract the head of the fetus during birth.
• B)instrument for assessing an Apgar rating of the newborn.
• C)specially shaped delivery table at birthing centers.
• D)external agent that causes developmental harm at particular times during pregnancy.

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Definitions:

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.

Calculating Reaction Time

Calculating reaction time involves measuring the duration between the onset of a stimulus and the initiation of a response, important in cognitive and neuropsychological assessments.