Question

Cells can use different types of signaling to achieve different goals. which of the following best describes hormonal signaling in animals?

A. a hormonal signal can be directed to a very specific target because a narrow space separates the target cell from the transmitting cell.
B. a concentration gradient between the signaling and target cells is established, causing cells along the gradient to respond differently.
C. numerous cells can receive and respond to the hormonal signal produced in their local vicinity.
D. specialized cells release hormone molecules into the circulatory system, allowing distant target cells to be affected.

Answer 1

Hormonal signaling in animals is described as specialized endocrine cells releasing hormones into the bloodstream to affect distant target cells, a form of endocrine signaling that allows for sustained responses.

Step-by-step explanation:

Hormonal signaling in animals is best described by the concept that specialized cells release hormone molecules into the circulatory system, which allows distant target cells to be affected. This is known as endocrine signaling, one of the four categories of chemical signaling in multicellular organisms.

Unlike paracrine signaling, which involves local signals acting on nearby cells, endocrine signals (hormones) originate from endocrine cells and travel great distances through the bloodstream, a slower form of transport that results in hormones being diluted and reaching their target cells in low concentrations. Endocrine signals are responsible for more sustained responses compared to the often quick and localized effects of paracrine signals.