Question

A new drug is found to prevent the contraction cycle in skeletal muscle from initiating but does not affect the fiber's excitability at the level of the sarcolemma. what might this new drug be doing?

Answer 1

This new drug restricts the ryanodine receptor's ability to open.

• As shown in the picture below, troponin is joined to the protein tropomyosin within the actin filaments.
• Tropomyosin prevents the myosin cross bridges' attachment sites when the muscle is at rest, inhibiting contraction.
• An Action Potential that travels from the nerves to the muscles causes a muscle contraction.
• The neurological system sends a signal, which triggers the onset of muscle contraction.
• A type of nerve cell called a motor neuron conducts the signal, an impulse known as an action potential.
• An alkaloid known as ryanodine was discovered in the South American plant Ryania speciosa.

learn more about ryanodine receptor here: https://brainly.com/question/26254731

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