Objectives: review the steps of the neuromuscular junction, the sliding filament theory of muscle contraction, and make the connection between the two by introducing the role of the sarcoplasmic reticulum.
What we did: We took time in groups of two or three to write down the steps of the intramuscular junction. Then we collaborated as a class to make the best summary we could of the steps on the whiteboard (picture). Then we watched 1:00-3:28 of Muscle Contraction Video to review Sliding Filament Theory, paying close attention to the roles of the Calcium ion and ATP. Finally, we connected the action potential spreading across the sarcolemma, to the release of calcium that triggers muscle contraction in the sarcomere: Calcium is stored in the sarcoplasmic reticulum, and the action potential causes it to be released into the sarcomeres. (picture shown in class) Comments are closed.
|
MAKE-UP WORKIf you missed a day, check here to see what we did the day you missed. It will include links to videos and any worksheets we did as well as due dates. It is your responsibility to keep track of your work! Thank you :) Archives |
Photo used under Creative Commons from hatcher10027