How is Paracrine Signaling Different from Other Types of Signaling

Question

How is paracrine signaling different from other types of signaling?
A) The signaling molecules are hormones.
B) The signaling molecules release neurotransmitters.
C) The signaling molecules are displayed on the cell surface and interact with nearby cells.
D) The signaling molecules are transferred by electrical signals and act on nearby cells.
E) The signaling molecules are diffused through interstitial fluid and act on nearby cells.

Accepted Answer

Paracrine signaling involves the diffusion of signaling molecules through the interstitial fluid, allowing them to act on nearby cells. This is distinct from other types of signaling, such as hormonal (which involves signaling molecules traveling through the bloodstream to distant cells) or synaptic signaling (which involves neurotransmitters crossing synaptic gaps to target cells).