BTEC Level 3 Applied Science Unit 2: Practical Scientific Procedures and Techniques Learning Aim B: Undertake calorimetry to study cooling curves

BTEC Level 3 Applied Science Unit 2: Practical Scientific Procedures and Techniques Learning Aim B: Undertake calorimetry to study cooling curves Describe the risk factors and features of atherosclerosis - ANS-o risks: smoking, diet and high blood pressure o effect of white blood cells (foam cells) o plaque in artery walls o reduction of lumen diameter o rupture of protective membrane over plaque formation of blood clot (thrombus) Describe the structure and function of endothelial tissue in arteries and veins - ANS-o endothelium reduces friction and allows for smooth flow of blood o damaged endothelial cells release substances that cause blood vessels to constrict o regulates blood flow and pressure Describe the structure and function of endothelial tissue in capillaries - ANS-o single layer of endothelium o easy exchange of nutrients and oxygen into the tissues and the removal of waste products What is the agonist? - ANS-a molecule that increases a neurotransmitter's action mimics action of transmitter on its receptors (e.g. nicotine or muscarine What is an antagonist? - ANS-o blocks action of transmitter on its receptors (e.g. atropine or curare) How does L-DOPA affect someone with Parkinson's disease? - ANS-o LDopa as precursor of dopamine, raises levels of dopamine, reduces muscle tremor and other motor problems plasma membrane - ANS-a microscopic membrane of lipids and proteins (Phospholipid bilayer) that forms the external boundary of the cytoplasm of a cell or encloses a vacuole, and that regulates the passage of molecules in and out of the cytoplasm. Golgi apparatus - ANS-A system of membranes that modifies and packages proteins for export by the cell Vesicle - ANS-Small membrane-bound sac that functions in moving products into, out of, and within a cell. Ribosomes - ANS-site of protein synthesis - 70s in prokaryotic cells - 80s in eukaryotic cells Mitochondrion - ANS-bean-shaped organelle that supplies energy (ATP) during the process of respiration , to the cell and has its own ribosomes and DNA. Centrioles - ANS-Cell organelle that aids in cell division in animal cells only Nucleus - ANS-the central and most important part of an object, movement, or group, forming the basis for its activity and growth. Contains DNA Nucleolus - ANS-Makes ribosomes