Final answer:
The adrenal medulla is incorrectly associated with producing steroids; it actually produces catecholamines. The adrenal cortex is responsible for producing steroids.
Step-by-step explanation:
The endocrine gland that is improperly matched to its function is (D) Adrenal medulla - producing steroids. The adrenal medulla is the inner part of the adrenal gland and it produces catecholamine hormones like epinephrine and norepinephrine, which are involved in the body's fight-or-flight response, not steroids. The adrenal cortex, which is the outer part of the adrenal gland, is responsible for producing steroids such as glucocorticoids, mineralocorticoids, and androgens.