KIN 205 Lecture Notes - Lecture 1: Membrane Potential, Homeostasis, Muscle Fascicle
8 Mar 2016
School
Department
Course
Professor
Document Summary
Function of muscles: primary function is to generate force. Can generate much more force with lengthening contractions compared with shortening contractions. Different forces of muscles but have commonalities. Present stimulus, and muscle will adapt to that stimulus. Skeletal muscle represents 30-40% of total body mass. Daily protein turnover rate in skeletal muscle ~12-13% in a day. Muscle maintenance net protein balance: rate of protein synthesis = rate of protein: training will breakdown protein but if consuming enough protein, it maintains breakdown protein. Muscle hypertrophy (i. e. strength training) net positive protein balance: rate of protein synthesis > protein breakdown. Muscle atrophy (i. e. aging and disease) net negative protein balance: rate of protein breakdown > protein synthesis: protein breakdown will occur at a greater rate than protein synthesis, temperature regulation. Overall mechanical efficiency only ~20% and balance of energy given off as heat.
