Examlex
Match each of the following terms with its corresponding definition or description.
-The exchange of oxygen and carbon dioxide in the lung
Circular Muscles
Muscles that are shaped in rings and typically found in various body systems, responsible for controlling the passage of substances by contraction and relaxation.
Ghrelin
A peptide hormone produced primarily in the stomach, the level of which rises before and falls after meals.
Leptin
A protein hormone produced by fat cells in the body that is related to eating and weight control.
Hormone
A chemical substance produced in the body that controls and regulates the activity of certain cells or organs.
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