GED Science Practice

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Prepare for the GED Science Test with our comprehensive quizzes. Study with flashcards and multiple-choice questions, each providing hints and explanations. Ensure your success on the GED Science Exam!

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What is the definition of hormone?

a) Material formed from decaying leaves and other organic matter
b) Unit for measuring the power of motors and engines
c) Wetness in the atmosphere
d) The secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect

The correct answer is: d) The secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect

The definition provided describes a hormone accurately. Hormones are chemical messengers produced by endocrine glands that travel through the bloodstream to target organs or tissues, where they exert specific effects on physiological processes, such as growth, metabolism, and mood regulation. This definition emphasizes the role of hormones in the body as essential regulators of many bodily functions, highlighting their significance in maintaining homeostasis and overall health. Understanding hormones is crucial because they are involved in a wide range of bodily functions, and any disruption in hormone levels can lead to various health issues. The other options describe unrelated concepts, such as organic material, motor power measurement, and atmospheric moisture, which do not pertain to the definition of hormones.