VPHY 3100 Chapter Notes - Chapter 6: Endocytosis, Neurotransmission, Voltage
19 Sep 2017
School
Department
Course
Professor
Document Summary
Chapter 6 interactions between cells and the extracellular environment. Looking at what constitutes our body in the outside environment of cells- interaction. The cells that compose the organs of our body are embedded within the extracellular material of connective tissue- material is extracellular matrix the extracellular environment includes everything that lies outside of cells. Movement through the cell membrane: diffusion and osmosis. Membrane must be selectively permeable to water. Concentration gradient for solute must exist across the membrane. Solute must be osmotically active - membrane nearly impermeable to solute. Aquaporins: specific portents present in the plasma membranes which serve as water channels. Water regulation in the body and exracellular fulid must maintianed blood plasma cells and adh in kidneys. Passive transport= all pumps and some carriers (symporters and antiporters) Active transport= all pumps and some carriers (uniporters: characteristics (shared by all classes) Facilitated diffusion is different than simple diffusion: glucose= facilitated diffusion and displays some properties of carrier mediated transport.
