BIOL1040 Lecture Notes - Lecture 8: Intercalated Disc, Skeletal Muscle, Myocyte
Document Summary
Mod 3 lecture 1: skeletal muscle and movement. There are 3 types of muscles: skeletal muscle, smooth muscle, cardiac muscle. Smooth muscle: found as the wall of: Memorise a few of these: smooth muscle helps to move along air and blood through tracts, not straited (each fibre is layer on top of the other in a random pattern) Branches are interweaved and pull all the muscles together in unison: muscle cells have intercalated disks through them. The action potential travels through the intercalated disks to contract muscle. Intercalated disks are present at different junctions of the branch, so action potential can split off into different cells. During development, many muscle cells fuse together which. This is because the fibres are thin and long, and more nuclei are needed for their sustenance. Recall: nucleus directs protein synthesis and repair (cell division: has sections called sarcomeres. These are units of muscle fibres that are involved in the contraction.
