BIOL 103 Lecture Notes - Lecture 3: Sodium Channel, Sensory Neuron, Acetylcholine

• School: Queen's University
• Department: Biology
• Course: BIOL 103
• Professor: Virginia K Walker

Document Summary

Slow oxidative fibers (red muscles: has myosin, low atpase, many mitochondria, long activity. Fast-oxidative fibers: myosin, high atpase, many mitochondria, rapid actions. Fast-glycolytic fibers (white muscles: myosin, high atpase, few mitochondria, myoglobin, very rapid intense. Sarcolemma - membrane that surrounds the muscle cells (plasma membrane) These muscles have more than one nuclei. Smooth and cardiac muscles have one nucleus. Multinucleate due to cytokinesis of the nucleus. Brain, spinal cord, sense organs and nerves. Cells that send and receive electrical & chemical signals from other neurons. A associated with glial cells nerve has hundreds of neurons neurons, making producing myelin. Ganglion collection of neuron cell bodies. Myelin sheath formed by glial cells , acts as insulator. Sensory neuron gets info from outside. Motor neuron sends signals away from sensory neurons for a. Glia produce the connective tissue and organize zones around the response (muscle/movement) Sodium channels travel from inside to outside. Potassium channels travel from outside to inside.