During Expiration, Relaxation of the Diaphragm and External Intercostals

question 9

Multiple Choice

During expiration, relaxation of the diaphragm and external intercostals

• A) increases the volume of the thoracic cavity.
• B) increases the pressure in the thoracic cavity.
• C) expands the rib cage.
• D) flattens the floor of the thoracic cavity.
• E) stimulates the phrenic nerve.

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Definitions:

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, responsible for processing and sending out nervous signals.

Spinal Cord

The long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column.

Neurons

The basic units of the nervous system; cells that receive, integrate, and transmit information in the nervous system. Neurons operate through electrical impulses, communicate with other neurons through chemical signals, and form neural networks.

Sensory Information

Data received by the sensory organs (like eyes, skin, ears) and transmitted to the brain for processing and interpretation.