Question

7. Which of the following hormones acts on its target tissues by a steroid hormone
mechanism of action?
A. Thyroid hormone
B. Parathyroid hormone (PTH)
C. Antidiuretic hormone (ADH) on the collecting duct
D. Glucagon

Answer 1

Answer:

Thyroid hormone uses a steroid hormone mechanism of action.

Steroid hormones are better known as water-insoluble hormones. Though thyroid hormone is not exactly a steroid hormone, it is water-insoluble.

The rest of the given hormones are all water soluble.

Explanation:

EXTRA INFO:

Steroid hormones bind to nuclear receptors( intracellular) while water-soluble or protein hormones bind to receptors on the cell membrane and send signals using secondary messengers.

Hormones secreted by adrenal cortex, by the gonads and thyroid hormones bind to intracellular receptors.

Pituitary hormones, pancreatic hormones, hormones of adrenal medulla, melatonin etc bind to cell membrane receptors.

[Hope it helps!]