Which of the following is an example of a simple endocrine pathway?
A) control of metabolism by thyroid hormones
B) release of secretin by cells of the duodenum after exposure to low pH
C) release of antidiuretic hormone from the posterior pituitary gland to regulate water balance
D) regulation of growth by the production of growth hormone

Question

Quizplus · Accepted Answer

In a simple endocrine pathway, a stimulus directly triggers the endocrine cells to release a hormone, which acts on its target cells to bring about a response. In choice B, the exposure of duodenal cells to low pH directly causes them to release secretin, a hormone that acts on the pancreas to secrete bicarbonate, neutralizing the stomach acid. This is a straightforward example of a simple endocrine pathway, as it involves a direct response to a stimulus without intermediate steps or additional hormones.

Which of the Following Is an Example of a Simple