KINE 3393 Study Guide - Midterm Guide: Fluid Balance, Cellular Respiration, Troponin
Document Summary
Chapter 1: structure and function of exercising muscle. Motor unit: neuron + muscle fiber = motor unit, signal from neuron gets propagated. Signal goes through neuron then is transmitted through synaptic cleft, which sends neurotransmitters to receptors on the muscle fiber. Once bound with receptors signal is sent down t-tubule to sarcoplasm reticulum, which releases calcium onto the muscle fiber. Calcium then binds to troponin in the myofilament actin, causing a shift in tropomyosin (shifting actin with it). Myosin binding sites on actin are revealed so myosin and actin can work together by forming myosin cross bridges to actin (attach to each other). Atp then binds to myosin head and releases myosin head from actin. Then through sliding filament theory the muscle contracts. Muscle filaments: myosin, thick filament, actin, thin filament, has different parts, troponin and tropomyosin (strings, calcium receptors. In between i and ii oxidation process: type ii: less time then oxidation.
