Final answer:
Neuromuscular blocker drugs use the suffixes "-curarine" and "-plegic." D-tubocurarine is an example of a neuromuscular blocker that prevents acetylcholine from triggering muscle contractions. Sympathoplegic drugs block sympathetic functions by antagonizing adrenergic receptors.
Step-by-step explanation:
The two suffixes used to identify neuromuscular blocker drugs, which are a type of skeletal muscle relaxant, are "-curarine" and "-plegic." An example of the first is d-tubocurarine, which acts by competitively blocking the transmitter action of acetylcholine, leading to muscle relaxation and paralysis. It renders the muscle cell insensitive to motor-nerve impulses and to direct applied acetylcholine while preserving its normal sensitivity to potassium ions and direct electrical stimulation. The suffix "-plegic" is used in the term "sympathoplegic," referring to drugs that interfere with sympathetic function. These drugs work as antagonists to adrenergic receptors, preventing norepinephrine or epinephrine from binding and thus cutting the sympathomimetic effect.