Kentucky State Registered Nurse Aide Practice Exam

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What is the process called when one breathes in?

Expiration

Inspiration

The process of breathing in air is referred to as inspiration. This term specifically describes the act of inhaling, where the diaphragm and intercostal muscles contract, allowing the lungs to expand and draw in air from the environment. The oxygen in the air is then transferred to the bloodstream, which is vital for cellular respiration and overall bodily function.

In contrast, other terms in the options refer to different aspects of the respiratory process. Expiration and exhalation both refer to the process of breathing out, where the diaphragm relaxes and air is pushed out of the lungs. Understanding these distinctions is essential in the context of respiratory physiology, as the words describe opposite actions within the breathing cycle.

Exhalation

Inhalation

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