Science Cell membrane structure and transport quiz 27 questions and answers

Science Cell membrane structure and transport quiz What is the structure of a phospholipid? - Hydrophilic phosphate head, 2 hydrophobic fatty acid tails one saturated one unsaturated glycoproteins vs. glycolipid - Glycoproteins are proteins attached to carbohydrates, and glycolipids are lipids attached to carbohydrates What is a Fluid Mosaic Model? - Fluid- movement/fluidity; Mosaic- everything put together; the cell membrane parts come together and performs one function What does it mean to be selectively permeable? - Certain cell membranes only allows certain cells to come into the cell and block other cells What is diffusion? - Diffusion- Movement of molecules from High to low concentration by random motion What can control the rate of Diffusion? - Temperature pressure mass What is dynamic equilibrium? - Continues movement but no NET overall change. What is passive transport? - Movement of particles across the cell membrane without using energy, it goes from high to low concentration What are the different ways of transport? - Osmosis, simple diffusion, faciliated diffusion What is osmosis? - Osmosis is the diffusion of H20; Water can be diffused through a protein call a aquaporin or through a phospholipid since it is nonpolar. What is a aquaporin? - Protein used in rapid diffusion what is simple diffusion? - Movement through phospholipid, only certain molecule can do this they have to be nonpolar and small to be able to cross What is Faciliated diffusion? - Use of transport proteins, helps transfer large, large/charged/ polar molecules