The endocrine network is composed of approximately _______ distinct endocrine glands or tissues.
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Answer: D. 20
Explanation
The human endocrine network consists of roughly twenty distinct endocrine glands and hormone-producing tissues dispersed throughout the body. These specialized glands secrete chemical messengers directly into the bloodstream to coordinate systemic physiological activities. Together, this intricate network regulates growth, metabolism, reproduction, and internal homeostasis successfully. Endocrine glands lack ducts and release their hormone products directly into surrounding capillary networks. Major endocrine organs include the pituitary, thyroid, adrenal glands, and pancreas, among others. Hormones circulate through the bloodstream to interact with specific receptors located on target cells.
Endocrine regulation is vital for helping the human body adapt to stress, exercise, and nutritional changes. Hormonal imbalances can cause widespread physiological disorders such as diabetes, thyroid disease, or growth issues. Medical endocrinology focuses on diagnosing and treating dysfunctions within this complex chemical signaling network. Fifty-nine is an excessive overestimation of the number of distinct major endocrine glands in humans. Twenty-nine exceeds the standard anatomical count of primary hormone-secreting endocrine structures. Seventy-eight is an inaccurate figure that does not align with standard anatomical classifications of endocrine organs.
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