Refer to the Figure Below

question 75

Multiple Choice

Refer to the figure below.

-Which arrow points to the iliac crest?

• A) A
• B) B
• C) C
• D) D

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Definitions:

Neurotransmitter

A chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.

Ligand-Gated Channels

Ion channels in cell membranes that open or close in response to the binding of a chemical signal (ligand), allowing ions to pass through the membrane.

Synaptic Vesicles

Membrane-bound sacs within presynaptic neurons that store neurotransmitters, which are released into the synaptic cleft to transmit signals to other neurons.

Neurotransmitter

Chemical substances released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.