How are pituitary secretions controlled by negative feedback?

A. The adrenal gland's hormones are primarily steroid-based:Many adrenal cortex hormones (glucocorticoids, mineralocorticoids, and androgens) are steroid hormones derived from cholesterol, distinguishing them chemically from many pituitary peptides.
B. The adrenal gland's hormone release is regulated by thyroid hormones:While thyroid hormones affect metabolism broadly, they are not the main regulators of adrenal hormone release; ACTH and the HPA axis primarily regulate adrenal cortisol production.
C. The pituitary gland's hormone release is directly controlled by the hypothalamus:The hypothalamus controls anterior pituitary hormone secretion via releasing and inhibiting hormones delivered through the hypophyseal portal system.
D. The pituitary gland produces hormones in response to blood glucose levels:Some pituitary functions can be influenced indirectly by metabolic state, but direct regulation of pituitary hormone release by blood glucose is not a primary mechanism.

A. Pituitary secretions are not controlled by negative feedback.:Pituitary secretions are widely regulated by negative feedback from peripheral hormones, so this statement is not accurate.
B. High levels of a hormone stimulate the pituitary to produce more of that hormone.:This describes positive feedback; most endocrine axes use negative feedback where high peripheral hormone levels suppress pituitary (and hypothalamic) release.
C. The pituitary senses changes in hormone levels and adjusts its secretions accordingly.:The pituitary responds to circulating hormone levels (often via hypothalamic signaling and direct feedback) to increase or decrease its hormone output — this describes negative feedback control.
D. Negative feedback causes the pituitary to stop producing all hormones.:Negative feedback reduces specific hormone release to maintain balance but does not indiscriminately stop all pituitary hormone production.