ES 3550 Lecture Notes - Lecture 3: Laminar Flow, Myocyte, Motor Neuron
Document Summary
Peloton wake (bicycle riding): 100% to 75% to 64% to 64% to 64% . Laminar flow leads to increased wake at low pressure. Turbulent flow leads to decreased wake at low pressure. Magnus effect is what a curveball in baseball is. Angle of attack= attitude angle minus the angle of projection. A positive angle of attack equals a stall which equals a shorter horizontal displacement. Dolphin example- ridges on skin increase turbulence which decreases wake. Motor unit- made up of motor neuron and muscle fibers to coordinate a muscle contraction. Low threshold motor unit- 0-100 hz firing rate; slow twitch; more endurance. High threshold motor unit- 100-200 hz firing rate; high twitch; more strength and power. Sodium opens potassium opens then na-k pump runs. Center drive- how brain relates to these cycles. In regards to muscle contract a high firing rate equals a high rate of force development. Endurance- quickly move blood to mitochondria (little muscle); create and conserve atp.
