At low concentrations, the plant alkaloid ryanodine locks ryanodine receptors into a half open state, allowing Ca²⁺ to flow. How will the actions of ryanodine compare between skeletal and cardiac muscle?

Question

Quizplus · Accepted Answer

Ryanodine receptors are present in both skeletal and cardiac muscle cells, where they play a crucial role in calcium release from the sarcoplasmic reticulum, essential for muscle contraction. Thus, ryanodine's action of locking these receptors in a half-open state would facilitate calcium flow in both muscle types, leading to their activation.

At Low Concentrations, the Plant Alkaloid Ryanodine Locks Ryanodine Receptors