Examlex
Define extinction and give the possible causes of mass extinction. What single human activity increases the susceptibility of a given species to extinction. Why?
Myofibrils
Rod-like units of muscle cells composed of long chains of sarcomeres, responsible for muscle contraction.
Action Potential
A rapid, temporary change in a cell's membrane potential, crucial for nerve impulse transmission and muscle contraction.
Calcium
A chemical element and an essential nutrient for living organisms, critical for bone health, muscle function, and nerve signaling.
Sodium
A chemical element (Na) that is an essential mineral for life, involved in nerve impulse transmission and muscle function.
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