Question

question 3
which type of chemical signaling occurs when a cell secretes a substance that acts upon one or more distant cells in other organs?
paracrine
endocrine
autocrine
direct

Explanation:

• Paracrine signaling: acts on nearby cells.
• Endocrine signaling: uses hormones transported via bloodstream to act on distant cells/organs.
• Autocrine signaling: acts on the same cell that secretes the substance.
• Direct signaling: involves direct cell - cell contact.

Answer:

B. Endocrine