Question

which statement is true about the paracrine messenger molecules?

the messenger molecules can travel a long distance.

the messenger molecules have delayed actions.

the messenger molecules have localized, short-term effects.

the messenger molecules cannot be degraded.

Explanation:

To determine the true statement about paracrine messenger molecules, we analyze each option:

• "The messenger molecules can travel a long distance": Paracrine signaling acts locally, so this is false.
• "The messenger molecules have delayed actions": Paracrine effects are typically rapid, not delayed, so this is false.
• "The messenger molecules have localized, short - term effects": Paracrine signaling involves molecules that act on nearby cells (localized) and the effects are short - lived, so this is true.
• "The messenger molecules cannot be degraded": Paracrine molecules are usually degraded or removed to terminate the signal, so this is false.

Answer:

The messenger molecules have localized, short - term effects.