Which of the following statements about the posterior pituitary is CORRECT? The posterior pituitary: O stores the neurohormones Aldosterone and Oxytocin in secretory vesicles and releases these neurohormones into the hypothalamic-hypophyseal portal system. O synthesizes Vasopressin and Oxytocin only when the neurohormones are required as neither hormone can be stored in secretory vesicles. stores the neurohormones Vasopressin and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation. O stores the neurohormones Aldosterone and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation. O stores the neurohormones Vasopressin and Oxytocin in secretory vesicles and releases these neurohormones into the hypothalamic-hypophyseal portal system.
Which of the following statements about the posterior pituitary is CORRECT? The posterior pituitary: O stores the neurohormones Aldosterone and Oxytocin in secretory vesicles and releases these neurohormones into the hypothalamic-hypophyseal portal system. O synthesizes Vasopressin and Oxytocin only when the neurohormones are required as neither hormone can be stored in secretory vesicles. stores the neurohormones Vasopressin and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation. O stores the neurohormones Aldosterone and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation. O stores the neurohormones Vasopressin and Oxytocin in secretory vesicles and releases these neurohormones into the hypothalamic-hypophyseal portal system.
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Transcribed Image Text:### Understanding the Posterior Pituitary Gland
#### Multiple-Choice Question on Posterior Pituitary Function
**Question:**
Which of the following statements about the posterior pituitary is **CORRECT**? The posterior pituitary:
1. ☐ stores the neurohormones Aldosterone and Oxytocin in secretory vesicles and releases these neurohormones into the hypothalamic-hypophyseal portal system.
2. ☐ synthesizes Vasopressin and Oxytocin only when the neurohormones are required as neither hormone can be stored in secretory vesicles.
3. ☐ stores the neurohormones Vasopressin and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation.
4. ☐ stores the neurohormones Aldosterone and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation.
5. ☐ stores the neurohormones Vasopressin and Oxytocin in secretory vesicles and releases these neurohormones into the hypothalamic-hypophyseal portal system.
#### Explanation of Options:
- **Option 1:** Incorrect. The posterior pituitary does not store Aldosterone. Aldosterone is produced by the adrenal cortex.
- **Option 2:** Incorrect. Both Vasopressin (ADH) and Oxytocin are indeed stored in secretory vesicles.
- **Option 3:** **CORRECT.** The posterior pituitary stores the neurohormones Vasopressin (ADH) and Oxytocin in secretory vesicles and releases these neurohormones into the general circulation.
- **Option 4:** Incorrect. The posterior pituitary does not store Aldosterone; it is stored and released by the adrenal cortex.
- **Option 5:** Incorrect. The hypothalamic-hypophyseal portal system is associated with the anterior pituitary, not the posterior pituitary.
The posterior pituitary gland is crucial for the storage and release of two primary neurohormones, Vasopressin (also known as Antidiuretic Hormone, ADH) and Oxytocin, directly into the bloodstream. These hormones play integral roles in water regulation and reproductive system function.
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