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When both ovaries are removed from a rat...

When both ovaries are removed from a rat which hormone is decreased in blood?

A

Oxytocin

B

Prolactin

C

Estrogen

D

Gonadotropic releasing factor

Text Solution

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The correct Answer is:
To determine which hormone decreases in the blood when both ovaries are removed from a rat, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Role of Ovaries**: The ovaries are responsible for producing several hormones, including estrogen, progesterone, and some androgens. These hormones play crucial roles in the reproductive system and secondary sexual characteristics in females. 2. **Understand Hormone Production**: When the ovaries are removed (a procedure known as oophorectomy), the production of ovarian hormones is significantly reduced or halted. This directly affects the levels of hormones that the ovaries produce. 3. **List the Hormones in the Options**: - **Oxytocin**: Produced by the posterior pituitary; not affected by the removal of ovaries. - **Prolactin**: Produced by the anterior pituitary; also not directly affected by the removal of ovaries. - **Estrogen**: Primarily produced by the ovaries; its levels will decrease significantly when the ovaries are removed. - **Gonadotropin-releasing hormone (GnRH)**: Produced by the hypothalamus; its levels may not be directly affected by the removal of the ovaries. 4. **Analyze the Effects of Ovarian Removal**: Since estrogen is an ovarian hormone, its levels will decrease significantly when both ovaries are removed. This is because the primary source of estrogen production in females is the ovaries. 5. **Conclusion**: The hormone that decreases in the blood when both ovaries are removed from a rat is **estrogen**. ### Final Answer: Estrogen is the hormone that decreases in blood when both ovaries are removed from a rat. ---
To determine which hormone decreases in the blood when both ovaries are removed from a rat, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Role of Ovaries**: The ovaries are responsible for producing several hormones, including estrogen, progesterone, and some androgens. These hormones play crucial roles in the reproductive system and secondary sexual characteristics in females. 2. **Understand Hormone Production**: When the ovaries are removed (a procedure known as oophorectomy), the production of ovarian hormones is significantly reduced or halted. This directly affects the levels of hormones that the ovaries produce. ...
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