What effect does curare have on muscles?

What effect does curare have on muscles?

• A. It enhances muscle contraction
• B. It paralyzes muscles through binding to ACh receptors
• C. It increases the release of neurotransmitters
• D. It stimulates muscle growth

Answer: (B)

Curare is a well-known neuromuscular blocking agent that has a significant impact on muscle function by binding to acetylcholine (ACh) receptors at the neuromuscular junction. This binding prevents acetylcholine, a neurotransmitter released from motor neurons, from attaching to its receptors on the muscle cell membrane. As a result, muscle contraction cannot occur, leading to paralysis. Curare effectively inhibits the activation of skeletal muscles, which is why it is classified as a skeletal muscle relaxant. The mechanism of action relates directly to its ability to interfere with the normal excitatory processes required for muscle contraction, distinguishing curare's primary effect on muscle physiology. Understanding this pharmacological effect is crucial, especially in the context of anesthesia and certain medical treatments where muscle relaxants are utilized.

Curare is a well-known neuromuscular blocking agent that has a significant impact on muscle function by binding to acetylcholine (ACh) receptors at the neuromuscular junction. This binding prevents acetylcholine, a neurotransmitter released from motor neurons, from attaching to its receptors on the muscle cell membrane. As a result, muscle contraction cannot occur, leading to paralysis. Curare effectively inhibits the activation of skeletal muscles, which is why it is classified as a skeletal muscle relaxant.

The mechanism of action relates directly to its ability to interfere with the normal excitatory processes required for muscle contraction, distinguishing curare's primary effect on muscle physiology. Understanding this pharmacological effect is crucial, especially in the context of anesthesia and certain medical treatments where muscle relaxants are utilized.