And I'm back again, folks, working to conquer a textbook over the summer. We have a long way to go. Today I present to you:
Chapter 1, Part 1:
Structure and Function of the Muscular System (Part 2/2)
Sliding Filament
Theory of Muscular Contraction
We left off last time discussing muscles and their makeup in
depth. Serious depth, actually. Before we continue on today with part 2 of the
muscular system, I want to remind you of our friends actin and myosin, two
myofilaments within a myofibril that are in charge of contracting the
muscle. I’m also going to bring
this picture back from the other day because it’s awesome.
First on today’s
agenda we have the sliding-filament
theory, which simply states that