[Campbell Biology P.1065] Which of the following correctly describes a form of cell signaling... | Practice Question

Which of the following correctly describes a form of cell signaling mentioned in the 'Summary of Key Concepts' section?

  • A: Neurohormones are secreted by neurons and travel through the bloodstream to act on distant target cells.
  • B: Pheromones are released into the circulatory system to regulate internal body functions.
  • C: Autocrine signals act on neighboring cells.
  • D: Endocrine signals act locally on cells in the immediate vicinity of the secreting cell.

Explanation

The text states: 'Neurohormones can act throughout the body.' This implies long-distance signaling through the circulatory system, consistent with them being secreted by neurons. Options B, C, and D contain inaccuracies regarding pheromones, autocrine, and endocrine signaling, respectively.