The Extrinsic Muscles of the Eye

question 28

Multiple Choice

The extrinsic muscles of the eye:

• A)are six in number for each eye
• B)move the eyeball within the orbit
• C)both A and B
• D)both A and B and are innervated by cranial nerves

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Definitions:

Postsynaptic Neuron

The neuron on the receiving end of a synapse, which receives signals from another neuron (the presynaptic neuron) through neurotransmitters.

Excitatory

Pertains to stimuli or substances that increase neuronal activity or facilitate the firing of neurons.

Inhibitory

Pertains to any process or substance that slows down or stops a particular reaction or activity.

Basic Drives

Fundamental biological impulses that drive behavior, such as hunger, thirst, sleep, and reproduction.