GED Science Practice 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Which term refers to the act of breathing in?

a. Ingestion

b. Inhalation

The act of breathing in is specifically referred to as inhalation. This process involves the diaphragm contracting and moving downwards, creating a vacuum that allows air to flow into the lungs. Inhalation is crucial for respiration, as it is how the body takes in oxygen, which is essential for cellular functions and overall metabolism.

In contrast, ingestion refers to the process of taking in food or liquids through the mouth, which is unrelated to the respiratory process. Insulin is a hormone produced by the pancreas that regulates blood sugar levels and has no direct connection to breathing. Insulation pertains to materials that reduce heat transfer and has no relevance to the act of breathing. Understanding these terms and their definitions is fundamental to grasping concepts in both biology and physiology.

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c. Insulin

d. Insulation

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