Corpus luteum in mammals occurs in

Options

A. Skin and acts as pain receptor
B. Heart and initiates atrial contraction
C. Ovaries and produce progesterone
D. Brain and connects lobes of cerebrum

Answer

**Step-by-Step Solution:**

1. **Understanding Corpus Luteum**: The corpus luteum is a structure that forms in the ovaries after ovulation. It develops from the Graafian follicle once the ovum (egg) is released.

2. **Formation Process**: After ovulation, which typically occurs around the 14th day of the menstrual cycle, the Graafian follicle transforms into the corpus luteum. This transformation is crucial for the reproductive cycle.

3. **Function of Corpus Luteum**: The primary role of the corpus luteum is to secrete the hormone progesterone. This hormone is essential for maintaining the uterine lining and supporting early pregnancy if fertilization occurs.

4. **Consequences of Lack of Fertilization**: If the ovum is not fertilized, the corpus luteum will eventually degrade, leading to a decrease in progesterone levels. This decline triggers menstruation.

5. **Identifying the Correct Location**: The question asks where the corpus luteum occurs in mammals. Based on the information discussed, the corpus luteum is specifically found in the ovaries of mammals.

6. **Evaluating Options**:
- Option 1: Skin and acts as a pain receptor - Incorrect.
- Option 2: Heart and initiates arterial contraction - Incorrect.
- Option 3: Ovaries and produce progesterone - Correct.
- Option 4: Brain and connects lobes of cerebrum - Incorrect.

7. **Conclusion**: The correct answer is that the corpus luteum occurs in the ovaries and is responsible for producing progesterone.

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