Which of the Following Statements Is NOT True Regarding the Normal

question 52

Multiple Choice

Which of the following statements is NOT true regarding the normal mechanism of ventilation?

• A)There must be a continuous column of air from the pharynx to the alveoli.
• B)The lungs must lie within a sealed-off thoracic cavity.
• C)The inner and outer pleural membranes must be separated by a thin film of fluid.
• D)The intrapleural pressure must be greater than the atmospheric pressure.
• E)The diaphragm,when contracted,will be lowered.

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Definitions:

Axons

Long, slender projections of nerve cells that conduct electrical impulses away from the neuron's cell body to other neurons, muscles, or glands.

Nerve Impulses

Electrical signals that are transmitted along nerve fibers in the nervous system.

Synapse

A junction between two nerve cells, consisting of a minute gap across which impulses pass by diffusion of a neurotransmitter.

Neurotransmitter

Chemical substances in the brain and body that transmit signals from one neuron to another, influencing various functions including mood, appetite, and sleep.