BIOL273 Lecture Notes - Lecture 5: Basal Lamina, Homeostasis, Organism
Document Summary
Unit 1: introduction to physiology (chapters 1, 3, 6) Study of structure and function of a living organism & its component parts. Most research focuses on cellular and molecular levels: how events within a single cell influence neighbouring cells, tissues, organs systems. Ecm (extracellular matrix) between cells: synthesized and secreted by cells in the tissue. Four primary tissue types in the human body: epithelial, connective, muscle, and neural. Regulate exchange of material between internal and external environment (across epithelium) One or more layers of cells connected to one another and basal lamina (basement membrane) Extensive ecm containing proteoglycans, collagen, elastin, and fibronectin. 3 types of muscle: skeletal gross body movement. Large, multinucleate, striated: smooth movement of substances, small, cardiac contraction of the heart, small, uninucleate, striated, branched. Carry information from one part of the body to another. 2 types: neurons carry information as electrical or chemical signals, glial cells supporting cells for neurons.