PHGY 209 Lecture Notes - Lecture 2: Motor Neuron, Grey Matter, Endoplasmic Reticulum

• School: McGill University
• Department: Physiology
• Course: PHGY 209
• Professor: Melissa A Vollrath

Document Summary

The first step on understanding this i knowing from where the energy comes from. Like pretty much every other thing in the cell, the every comes from atp. The key player is the myosin head group. The head group can bind and hydrolyze atp, which produces energy. This energy is used to drive the movement. A molecule of atp binds to a head group. The head group (being and atpase) hydrolyses the atp into adp and a phosphate group releasing energy. The energy is used to stretch out the head group of he myosin. The head group then binds to the actin filament. When if binds, the adp and the phosphate groups get off, which makes the head group go back to the initial position. The head group is not tightly bounded to the actin filament. A new molecule of atp comes in, binds to the head group, making the head group let go from the actin filament.