AP BIOLOGY

THE CELL

CELL COMMUNICATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How is paracrine and hormone signaling different?
A
hormone signaling involves bloodstream, long-distance and paracrine involves extracellular fluid, short-distance
B
hormone signaling involves extracellular fluid, short-distance and paracrine involves bloodstream, long-distance
C
hormone signaling involves extracellular fluid, long-distance and paracrine involves bloodstream, short-distance
D
hormone signaling involves bloodstream, short-distance and paracrine involves extracellular fluid, long-distance
Explanation: 

Detailed explanation-1: -Because of their form of transport, hormones get diluted and are present in low concentrations when they act on their target cells. This is different from paracrine signaling in which local concentrations of ligands can be very high.

Detailed explanation-2: -Paracrine signaling Often, cells that are near one another communicate through the release of chemical messengers (ligands that can diffuse through the space between the cells). This type of signaling, in which cells communicate over relatively short distances, is known as paracrine signaling.

Detailed explanation-3: -Signaling molecules known as paracrine factors diffuse over a relatively short distance (local action), as opposed to cell signaling by endocrine factors, hormones which travel considerably longer distances via the circulatory system; juxtacrine interactions; and autocrine signaling.

Detailed explanation-4: -Answer and Explanation: Yes, endocrine signaling is an example of long-distance signaling. Specialized cells, tissues, glands, and organs use the circulatory system to send the hormones they produce in order to target cells in other parts of the body. It produces a slow and long-lasting response in these target cells.

There is 1 question to complete.