Figure 41-2 Use the figure to answer the corresponding question(s). -When the dentist gives you a shot of Novocain, why to you not feel any pain when s/he drills into your tooth? A) The neuron remains in the depolarized state. B) A transmembrane potential does not form. C) The drug decreases the external Na⁺ concentration. D) Voltage-activated K⁺ channels are blocked. E) Nerve transmission is blocked.

Question

Quizplus · Accepted Answer

Novocain works by blocking sodium channels on the nerve cells, preventing the initiation and propagation of nerve impulses, which results in the inability to feel pain.

Figure 41-2 Use the Figure to Answer the Corresponding Question(s)