Thyroxine, the hormone of the thyroid gland, primarily controls the
Correct answer: B. rate of metabolism and heat production of the body
- A. concentration of glucose in the blood
- B. rate of metabolism and heat production of the body
- C. amount of calcium in the bones
- D. volume of urine produced
Explanation
Thyroxine sets the basal metabolic rate of nearly every cell, which is why an overactive thyroid causes weight loss and heat intolerance. Blood glucose is governed by insulin and glucagon, and urine volume by ADH.
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Receptors are specialized cells or proteins that detect stimuli such as light, sound, pressure, temperature and chemicals, then initiate responses through sensory or hormonal pathways. Questions distinguish sensory receptors from effectors, compare receptor types, and examine stimulus conversion into nerve impulses, including the roles of rods, cones, chemoreceptors and mechanoreceptors.
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