What Is the Last Single Airway Passage from the Outside

question 66

Multiple Choice

What is the last single airway passage from the outside environment prior to branching between two major bronchi?

• A) pharynx
• B) bronchi
• C) trachea
• D) alveoli
• E) throat

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Definitions:

Sodium Channels

Protein channels located in cell membranes that allow the passage of sodium ions in and out of the cell, playing a crucial role in generating electrical signals in neurons and muscle cells.

Motor End Plate

A region of muscle fiber membrane that receives signals from nerves, triggering muscle contraction.

Presynaptic Membrane

The part of the nerve cell that is situated at the synapse and releases neurotransmitters in response to a nerve impulse.

Motor Neuron

A motor neuron is a nerve cell that initiates and transmits a signal to a muscle or gland to trigger a response.