KIN 190 Lecture Notes - Lecture 8: Motor Neuron, T-Tubule, Endomysium
Document Summary
3 types: skeletal, cardiac, and smooth: skeletal muscle tissue. Works in a voluntary manner (activity is consciously controlled: cardiac muscle tissues. Has hormones + neurotransmitters that can adjust heart rate: smooth muscle tissue. In walls of hollow internal structures (blood vessels, airways, most organs in abdominopelvic cavity) 4 functions: producing body movements, stabilizing body positions, storing and moving substances within the body, generating heat - thermogenesis (shivering) Ability to respond to certain stimuli by producing electrical signals called action potentials (impulses) Ability to contract forcefully when stimulated by an action potential: extensibility. Ability to stretch, within limits, without being damaged eg. smooth muscle of stomach wall stretches when filled with food: elasticity. Ability to return to its original length and shape after contraction or extension. Each skeletal muscle is a separate organ composed of hundreds to thousands of cells called muscle fibres.
