[Campbell Biology P.1157] Based on Figure 50.3, which statement accurately describes a key di... | Practice Question

Based on Figure 50.3, which statement accurately describes a key difference in how neuronal and non-neuronal receptors signal to the afferent neuron?

  • A: Neuronal receptors use neurotransmitters, while non-neuronal receptors directly generate action potentials in the afferent neuron.
  • B: Non-neuronal receptors are always found in sensory organs, whereas neuronal receptors exist singly.
  • C: Non-neuronal receptors release neurotransmitters that bind to receptor proteins on the afferent neuron.
  • D: Both types of receptors are essentially the same cell type, just organized differently.

Explanation

Figure 50.3 illustrates that neuronal receptors are themselves afferent neurons, directly transmitting signals. In contrast, non-neuronal receptors are separate cells that, upon stimulation, release neurotransmitters to signal the afferent neuron.