AP BIOLOGY

Detailed explanation-1: -Long-distance signaling is also called endocrine signaling. It is observed in multicellular organisms like frog.

Detailed explanation-2: -Endocrine signaling is an example of long distance communication between hormone producing cells, tissues and glands and cells that express hormone receptor molecules.

Detailed explanation-3: -In long distance signaling, plants and animals use chemicals called hormones. Hormonal signaling in animals is called endocrine signaling; in which specialized cells release hormones, which then travel to target cells via the circulatory system.

Detailed explanation-4: -In endocrine signaling, the signaling molecules (hormones) are secreted by specialized endocrine cells and carried through the circulation to act on target cells at distant body sites.

Detailed explanation-5: -Autocrines are long-distance chemical signals that travel in blood throughout the body.