A Western Blot Analysis of the Expression of Estrogen Receptors

question 84

Multiple Choice

A Western blot analysis of the expression of estrogen receptors in ovarian tissues at different times of the estrous cycle showed approximately four times greater protein levels at day 2 compared with day 10 of the cycle.Which of the following may be true given these data?

• A) Estrogen is acting as an endocrine signal in the ovaries.
• B) Estrogen is acting as an autocrine signal in the ovaries.
• C) Ovaries only secrete estrogen early in the estrous cycle.
• D) Ovarian tissue is responsive to estrogen only early in the estrous cycle.

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