Question

indicate whether each statement is true or false. hypothalamic neuropeptides are carried from the hypothalamus to the posterior pituitary via a portal system. axons of the neurosecretory neurons extend from the hypothalamus through the infundibulum. the axon endings of hypothalamic neurons store neurohormones in the posterior pituitary. neurohormones secreted by the posterior pituitary are produced by the hypothalamus.

Explanation:

1. Hypothalamic neuropeptides are carried from the hypothalamus to the anterior pituitary via a portal system, not the posterior pituitary, so the first statement is false.
2. Axons of neurosecretory neurons do extend from the hypothalamus through the infundibulum to the posterior pituitary, so the second statement is true.
3. The axon endings of hypothalamic neurons in the posterior pituitary store neurohormones, so the third statement is true.
4. Neurohormones secreted by the posterior pituitary (oxytocin and vasopressin) are produced by the hypothalamus, so the fourth statement is true.

Answer:

1. False
2. True
3. True
4. True