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Pars distalis region of pituitary does n...

Pars distalis region of pituitary does not produce these enzymes
I. Melanocyte stimulating hormone
II. Vasopressin
III. Prolactin
IV. Growth hormone

A

III only

B

I and IV only

C

II and IV only

D

I and II only

Text Solution

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The correct Answer is:
To solve the question regarding which enzymes are not produced by the pars distalis region of the pituitary gland, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Structure of the Pituitary Gland**: - The pituitary gland is divided into two main parts: the adenohypophysis (anterior pituitary) and the neurohypophysis (posterior pituitary). 2. **Identify the Regions of the Adenohypophysis**: - The adenohypophysis consists of two regions: pars distalis and pars intermedia. 3. **Hormones Produced by Pars Distalis**: - The pars distalis produces several hormones including: - Growth Hormone (GH) - Prolactin (PRL) - Thyroid Stimulating Hormone (TSH) - Adrenocorticotropic Hormone (ACTH) - Luteinizing Hormone (LH) - Follicle Stimulating Hormone (FSH) 4. **Hormones Produced by Pars Intermedia**: - The pars intermedia primarily produces Melanocyte Stimulating Hormone (MSH). 5. **Hormones Produced by Neurohypophysis**: - The neurohypophysis (specifically the pars nervosa) stores and releases: - Oxytocin - Vasopressin (also known as Antidiuretic Hormone, ADH) 6. **Analyze the Given Options**: - Now, we need to determine which of the listed hormones are not produced by the pars distalis: - I. Melanocyte Stimulating Hormone (produced by pars intermedia) - II. Vasopressin (produced by neurohypophysis) - III. Prolactin (produced by pars distalis) - IV. Growth Hormone (produced by pars distalis) 7. **Conclusion**: - From the analysis, we find that Melanocyte Stimulating Hormone (I) and Vasopressin (II) are not produced by the pars distalis region. Therefore, the correct answer is **I and II only**. ### Final Answer: The pars distalis region of the pituitary does not produce Melanocyte Stimulating Hormone (I) and Vasopressin (II).
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