Multiple Choice
Where is follicle-stimulating hormone (FSH) secreted?
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16. The Endocrine System
Introduction to the Endocrine System
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Which is one of the two primary thyroid hormones that influences the rate of metabolism?
A
Insulin
B
Thyroxine (T4)
C
Calcitonin
D
Parathyroid hormone (PTH)
Verified step by step guidance1
Begin by identifying the primary function of the thyroid gland, which is to regulate metabolism in the body.
Understand that the thyroid gland produces two main hormones: Thyroxine (T4) and Triiodothyronine (T3). Both of these hormones play a crucial role in controlling the body's metabolic rate.
Recognize that Thyroxine (T4) is one of the primary hormones produced by the thyroid gland. It is converted into the more active form, Triiodothyronine (T3), in the body's tissues.
Differentiate Thyroxine (T4) from other hormones listed in the problem: Insulin, Calcitonin, and Parathyroid hormone (PTH). Insulin is produced by the pancreas and regulates blood sugar levels, Calcitonin is involved in calcium homeostasis, and PTH regulates calcium levels in the blood.
Conclude that Thyroxine (T4) is the correct answer as it is one of the two primary thyroid hormones that influences the rate of metabolism.
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