The vagus normally stimulates the stomach's parietal cells to secrete acid and intrinsic factor.

The next question was, what physiological factors normally stimulate the secretion of the parotid hormone?

Melanocyte-stimulating hormone normally stimulates melanocytes to make black eumelanin, but if the melanocytes have a mutated receptor, they will make reddish pheomelanin instead.

The pill signals the pituitary gland, which directs hormonal activity in the body, not to release the hormones that would normally stimulate the ovary to release an egg.

Gonadotropins are the hormones in the body that normally stimulate the gonads (testes and ovaries).

Brain imaging in children exhibiting symptoms of dyscalculia show less gray matter or less activation in the intraparietal regions stimulated normally during mathematical tasks.

Hypoglycemia can occur with beta blockade because β2-adrenoceptors normally stimulate hepatic glycogen breakdown (glycogenolysis) and pancreatic release of glucagon, which work together to increase plasma glucose.

VEGF is a protein that normally stimulates the growth of blood vessels, and interleukin-1 is a protein that is normally involved in inflammation.

Because F-2,6-BP normally stimulates phosphofructokinase-1(PFK1), the decrease in its concentration leads to the inhibition of glycolysis and the stimulation of gluconeogenesis.

The kidney hormone renin normally stimulates the adrenal glands to release aldosterone.