Topic 1 - Edexcel A Level Biology A Already Passed

What are statins? {Ans: They are drugs which lower the amount of 'bad' cholestrol in blood.}What do veins do? {Ans: Take blood back to the heart}what are examples of starch? {Ans: amylose and amylopectin}What do open circulatory systems allow? {Ans: substances to diffuse between blood and cells, mass flow of nutrients to cells}why is glycogen are source of energy {Ans: as it is branched, when it is broken down energy can be released from multiple places on it}What is diastole? {Ans: relaxation}Cohesion {Ans: Attraction between molecules of the same type}What is the waist to hip ratio? {Ans: waist circumference / hip circumference}unsaturated lipids {Ans: DO have a double bond between carbon atoms in their hydrocarbon tail}Why does the heart have coronary arteries on the surface? {Ans: It needs oxygen it's own supply of oxygen to pump the blood around the body}What is a polysaccharide? {Ans: polymers of monosaccharides}Where does blood from the pulmonary vein go to? {Ans: Left atrium}Solvent {Ans: Substances dissolve in it e.g. water+++}What is HDL cholesterol? {Ans: good cholesterol that is made of mainly protein}what are platelet inhibitory drugs? {Ans: drugs that