PET-3322 Lecture Notes - Lecture 10: Anaerobic Glycolysis, Homeostasis, Phosphocreatine
6 Nov 2017
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Chapter 9 part b: muscles and muscle tissue. The motor unit: motor unit consists of the motor neuron and all muscle fibers it supplies, smaller the fiver number, the greater the fine control. If stimuli frequency increases, muscle tension reaches maximum: referred to as fused (complete) tetanus because contractions. Muscle tone: constant, slightly contracted state of all muscles, due to spinal reflex, groups of motor units are alternately active in response to input from stretch receptors in muscles, keeps muscles firm, healthy, and ready to respond. Providing energy for contraction: atp is regenerated quickly by 3 mechanisms, direct phosphorylation of adp by creatine phosphate (cp, anaerobic pathway: glycolysis and lactic acid formation, aerobic respiration. 15 seconds: anaerobic pathway: glycolysis and lactic acid formation. Atp can also be generated by breaking down and using energy stored in glucose: glycolysis: first step in glucose breakdown. Glucose is broken into 2 pyruvic acid molecules.
