When the Diaphragm and External Intercostal Muscles Contract

question 18

Multiple Choice

When the diaphragm and external intercostal muscles contract,

• A) the volume of the thorax increases.
• B) the volume of the thorax decreases.
• C) the volume of the lungs decreases.
• D) the lungs shrink.
• E) expiration occurs.

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Definitions:

Skin Cancer

A form of cancer that originates in the skin cells, often due to excessive UV radiation exposure, with types including melanoma and basal cell carcinoma.

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Blond Hair

Hair color characterized by low levels of the dark pigment eumelanin, resulting in light shades of hair.

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The stratum spinosum is a layer of the epidermis found between the stratum granulosum and stratum basale, characterized by its spiny appearance due to the desmosomes that join cells together.