When a Neurotransmitter Like GABA Is Acting in an Inhibitory

question 63

Multiple Choice

When a neurotransmitter like GABA is acting in an inhibitory manner which of the following is likely a result of the GABA acting on the post synaptic cell?

• A) influx of positively charged ions into the postsynaptic cell
• B) opening of chemically gated sodium channels
• C) depolarization of the postsynaptic cell membrane
• D) hyperpolarization of the postsynaptic cell membrane

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Definitions:

Deltoid

A large triangular muscle covering the shoulder joint and responsible for lifting the arm and giving the shoulder its range of motion.

Teres Minor

A small muscle of the rotator cuff that assists in rotating the arm laterally and stabilizes the shoulder joint.

Biceps Brachii

A muscle of the upper arm that flexes the forearm and is involved in moving the shoulder and elbow.

Ventral Root

The part of a spinal nerve that emerges from the anterior portion of the spinal cord, containing motor fibers that transmit neural signals from the spinal cord to the body muscles.