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The

secretes a hormone that increases the body's metabolic rate promotes alertness, quickens reflexes, and stimulates the fetal nervous system.
Answer and Explanation

The Correct Answer is {"dropdown-group-1":"C"}

A. thymus: The thymus secretes thymic hormones (immune function) - it does not control metabolic rate or fetal neural development.
B. parathyroid gland: The parathyroids secrete PTH to regulate calcium - not metabolic rate or alertness.
C. thyroid gland: The thyroid secretes T3/T4 which increase basal metabolic rate, enhance alertness and reflexes, and are critical for fetal nervous system development.
D. pancreas: The pancreas secretes insulin and glucagon regulating glucose metabolism, not primarily metabolic rate/alertness in the sense described.


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Related Questions

Correct Answer is A

Explanation

True: O₂ binds to the heme (iron) portion of hemoglobin, whereas CO₂ binds primarily to amino groups on the globin (forming carbaminohemoglobin) and much CO₂ is also converted to bicarbonate inside RBCs, so they bind/are carried at different sites/forms.

Correct Answer is C

Explanation

A. The chemical properties of the hormone: Chemical properties (lipid-soluble vs water-soluble) determine how a hormone reaches/enters cells and what type of receptor it uses, but they do not by themselves make a specific cell responsive.
B. The location of the gland that secretes the hormone: Where the hormone is secreted from does not determine whether a particular cell is responsive.
C. The location of the target cells in the body: A cell becomes responsive to a particular hormone only if it possesses specific receptors for that hormone. These receptors can be on the cell surface or inside the cell, depending on the hormone type.

D. The site where the hormone is secreted: The secretion site does not determine a cell’s responsiveness.

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