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Which of the Following Is a Neurotransmitter That Triggers a Contraction

question 23

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Which of the following is a neurotransmitter that triggers a contraction of a voluntary muscle?


Definitions:

Tympanic Membrane

The medical term for the eardrum, a thin membrane that divides the outer ear from the middle ear and vibrates in response to sound waves.

External Ear

The outer portion of the ear, consisting of the auricle and the ear canal.

Middle Ear

The part of the ear located between the eardrum and the oval window, containing the three small bones that transmit sound vibrations.

Deafness

The condition of lacking the power of hearing or having impaired hearing.

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