Which organ stores blood and releases it into circulation when the body's oxygen demand increases?

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Study for the VTNE Laboratory Procedures Test. Use flashcards and multiple choice questions, each question offers hints and explanations, enabling increased understanding and retention. Prepare effectively for your exam!

Multiple Choice

Which organ stores blood and releases it into circulation when the body's oxygen demand increases?

Explanation:
The spleen stores a reserve of red blood cells and can contract to release them into circulation when needed, such as during increased physical activity or stress. This release boosts the blood’s oxygen-carrying capacity, helping tissues meet higher oxygen demands quickly. Other organs listed have different primary roles: the pancreas produces digestive enzymes and hormones like insulin; the parathyroid glands regulate calcium levels; and the liver stores glycogen and handles various metabolic and detoxification tasks.

The spleen stores a reserve of red blood cells and can contract to release them into circulation when needed, such as during increased physical activity or stress. This release boosts the blood’s oxygen-carrying capacity, helping tissues meet higher oxygen demands quickly.

Other organs listed have different primary roles: the pancreas produces digestive enzymes and hormones like insulin; the parathyroid glands regulate calcium levels; and the liver stores glycogen and handles various metabolic and detoxification tasks.

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