Examlex
Nickel (Ni) crystallizes as a face-centered unit cell with an edge length of 382 pm. What is the atomic radius of nickel?
Sarcoplasm
The cytoplasm within a muscle cell, containing organelles, proteins, and the substances required for muscle contraction.
Sarcomere
The basic contractile unit of muscle fiber, consisting of actin and myosin filaments between two Z-lines in striated muscle cells.
T Tubule
Tubular extensions of the plasma membrane in muscle cells that facilitate the uniform contraction of the muscle by spreading electrical impulses.
Myosin
A protein that, along with actin, enables muscular contraction and movement in animal cells.
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