An individual has just ingested a chemical that binds irreversibly to the ACh receptors in the sarcolemma. By itself it does not alter membrane potential, yet prevents normal neurotransmitter binding. Ignoring the effects on any other system, the consequence to skeletal muscle would be ________.
A) irreversible contraction as soon as the first nervous stimulation reached the sarcolemma
B) no contraction at all by nervous mechanisms
C) contraction if stimulated by an external electrode
D) no contraction at all by nervous mechanisms, but contraction if stimulated by an external electrode
Answer: D