Curariform substances introduced into a human body cause the relaxation of all skeletal muscles. What changes in the neuromuscular synapse cause this phenomenon?

Answer options

1. Blockade of N-cholinergic receptors of the synaptic membrane
2. Depolarization of the postsynaptic membrane
3. Impaired acetylcholine release
4. Blockade of Ca2 channels of the presynaptic membrane
5. Impaired cholinesterase synthesis

Explanation

N- Cholinergic receptors are found in the sympathetic nervous system (skeletal muscle).