[Campbell Biology P.1049] Which of the following statements correctly describes a type of int... | Practice Question
Which of the following statements correctly describes a type of intercellular communication as illustrated in Figure 45.2?
A: In autocrine signaling, secreted molecules travel via the bloodstream to affect distant target cells.
B: Synaptic signaling involves neurotransmitters diffusing across a synapse to trigger responses in the secreting cell.
C: Endocrine signaling involves local regulators diffusing short distances to affect neighboring cells.
D: In neuroendocrine signaling, neurohormones diffuse into the bloodstream and trigger responses in target cells anywhere in the body.
Explanation
Figure 45.2e and its caption explicitly state that in neuroendocrine signaling, neurohormones diffuse into the bloodstream and trigger responses in target cells anywhere in the body. Options A, B, and C describe incorrect characteristics or types of signaling.