Adenohypophysis includes

Options

A. Pars distalis, pars tuberalis and pars nervosa
B. pars distalis, pars intermedia and pars nervosa
C. Pars tuberalis, pars intermedia and pars nervos
D. Pars distalis, pars tuberalis and pars intermedia

Answer

**Step-by-Step Solution:**

1. **Understanding Adenohypophysis**: The adenohypophysis, also known as the anterior pituitary, is a part of the pituitary gland that is responsible for producing and secreting various hormones.

2. **Identifying Components**: The adenohypophysis consists of three main parts:
- **Pars Distalis**: This is the largest part of the adenohypophysis and is responsible for the secretion of several key hormones.
- **Pars Intermedia**: This is a thin layer that separates the pars distalis from the pars nervosa and has some hormone-secreting activity.
- **Pars Tuberalis**: This part wraps around the infundibulum and is involved in the regulation of hormone secretion.

3. **Excluding Incorrect Options**:
- **Option 1**: Pars Distalis, Pars Tuberalis, and Pars Nervosa - This option is incorrect because Pars Nervosa is part of the neurohypophysis (posterior pituitary), not the adenohypophysis.
- **Option 2**: Pars Distalis, Pars Intermedia, and Pars Nervosa - This option is also incorrect for the same reason as above.
- **Option 3**: Pars Tuberalis, Pars Distalis, Pars Tuberalis, Pars Nervosa - This option is incorrect due to the inclusion of Pars Nervosa.
- **Option 4**: Pars Distalis, Pars Intermedia, and Pars Tuberalis - This option is correct as it includes only the parts that belong to the adenohypophysis.

4. **Conclusion**: The correct answer is **Option 4: Pars Distalis, Pars Intermedia, and Pars Tuberalis**.

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