KINE 1P90 Lecture Notes - Lecture 4: Muscle Tone, Protein Isoform, Muscle Spindle

• School: Brock University
• Department: Physical Education and Kinesiology
• Course: KINE 1P90
• Professor: Klentrou Panagiota

Document Summary

For a muscle to contract, it needs a neural impulse (an electrical event) Neural impulses are electrical currents that pass along nerve fibres. The anatomy of the nerve o o o o o o o o o o o o o o o o o o o o o. Neurons connected through synopses (helps communication from neurons to muscles) Myelin insulated the axon and allows for faster nerve conduction. Nerve impulse has to jump because "nodes of ranvier" are spaces that makes is so that the connection cant travel in a continuous line. The electrical signal that travels along the nerve is an action potential. In other words, the electric charge inside the cell is different than the electric charge outside of the cell (electrically polarized) This is caused by a difference in the relative number of cations (+) and anions (-) in the intracellular fluid (icf) and the extracellular fluid (efl)