Credit: INTELECOM /SCIENCE PHOTO LIBRARY

Caption: Calcium pumps transport calcium back into sarcoplasmic reticulum, ending an action potential and causing relaxation. The process of muscle contraction will continue until the action potential is terminated. Relaxation is achieved when calcium pumps have actively transported calcium back into the sarcoplasmic reticulum, reversing the changes that previously occurred in troponin. Tropomyosin is now back in its original position covering the myosin binding sites on actin, preventing crossbridges and power stroke cycling.

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Keywords: actin, action potential, brain, calcium, calcium pumps, cross bridge cycling, muscle, myofibril, myosin, myosin head, nervous system, neuromuscular junction, power stroke, sarcomere, sarcoplasmic reticulum, tropomyosin, troponin

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Calcium Pumps

K005/0663 Rights Managed

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Duration: 00:00:36.15

Frame size: 1920x1080

Frame rate: 29.97

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 930.9M

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Capture format: QuickTime Animation

Codec: Photo - JPEG

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