BIO310H5 Lecture Notes - Lecture 1: Physiology, Endocrine System, Blood Sugar
Document Summary
4 types: muscle, cells specialized in contraction, 3 types. Skeletal: attached to the bones voluntary control. Appear like rods separated into sarcomeres which give it the stripes. When they contract together they release heat. Smooth: surrounds hallow tubes and cavities for pushing of contents (i. e. esophagus) involuntary control. Cardiac: only found in the heart involuntary control. Muscles appear like both stripe rods and smooth: nervous, initiate & conduct electrochemical signals from one part of the body to another, can stimulate other cells to: Stimulate glands to release chemicals (ie; hypothalamus > pit gland: made of up: Soma: the cell which contains a nucleus. Dendrites: appear like arms/ ngers which are connected to environment. Axons: the stem of the cell which signal travels through the body. Schwann cells: act as an insulation to the axons (i. e. ; if they break down/ dissolve then it leads to ms) Myelin sheath: the total of schwann cells covering axons.
