The hypothalamus-pituitary axis is a system used to regulate many aspects of the body. Which of the following statements apply to the hypothalamus-pituitary axis? Select all the correct statements.
a. The action of the neurons from the hypothalamus is direct for the posterior pituitary, that is, the neurons extend from the hypothalamus to the posterior pituitary where the axon terminal releases hormones that go directly into the blood.
b. Neurosecretory cells of the hypothalamus secrete releasing factors that enter the anterior pituitary via a portal system to cause release of hormones from the anterior pituitary.
c. The pituitary gland transmits signals from the nervous system to the hypothalamus.