NURS 220 Lecture Notes - Lecture 10: Endoplasmic Reticulum, Sliding Filament Theory, Myocyte
Document Summary
Myofilaments(actin and myosin-individual strings) make up the myofibrils(bundles of proteins) make up the muscle fibers(individual cells) which make up the muscle fascicles(bundles of muscle cells) which makes up the. Interaction of the antagonistic muscles (whether they are contracting or relaxing) that gives you posture. Movement-as you form bridges between the two fibers and one slides over the other, you will get movement. Communication-allows us to express what is happening inside our brain. Heat production-when you transfer energy and you use energy you produce heat and that heat is utilized to maintain body temperature. Heat production is a byproduct of activity of the muscles. Skeletal-allows you to move through the external environment. Overview-muscle fibers (aka cells) made of multiple embryonic cells that have fused together. 2. blood supply-blood supply is never far, uses diffusion to receive nutrients. 4. nerve supply-a muscle fiber receives directions from only one neuron. striated- looks like it is striped.
