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Reproductive Endocrinology

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Which of the following terms most accurately describes autocrine hormone communication?

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a. The hormone produced and secreted acts on its own cell

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b. The hormone produced and secreted acts on distant organs

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c. The hormone produced and secreted acts on neighboring cells

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d. The hormone produced acts intracellularly prior to secretion

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The image below portrays which type of hormone action?

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Reproduced, with permission, from Halvorson LM: Reproductive endocrinology. In Schorge JO, Schaffer JI, Halvorson LM, et al (eds): Williams Gynecology, 1st ed. New York, McGraw-Hill, 2008, Figure 15-2B.

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a. Autocrine

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b. Endocrine

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c. Paracrine

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d. Intracrine

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Luteinizing hormone (LH) and human chorionic gonadotropin (hCG) have similar biologic activity for which of the following reasons?

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a. Their β-subunits have 80% homology.

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b. They have nearly homologous α-subunits.

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c. They are produced by the same pituitary cell type.

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d. They are converted to the same amino acid sequence peripherally.

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The last step in estrogen synthesis requires which of the following enzymes?

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a. Aromatase

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b. 5α-Reductase

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c. 21-Hydroxylase

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d. 11β-Hydroxylase

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Based on the diagram below, Enzyme A is which of the following?

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Reproduced, with permission, from Halvorson LM: Reproductive endocrinology. In Schorge JO, Schaffer JI, Halvorson LM, et al (eds): Williams Gynecology, 1st ed. New York, McGraw-Hill, 2008, Figure 15-13.

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a. 21-Hydroxylase

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b. 11β-Hydroxylase

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c. 17α-Hydroxylase

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d. 3β-Hydroxysteroid dehydrogenase

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Based on the diagram below, Enzyme ...

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