Answers to examination-style questions
Answers
1 (a) (i) uild up of fatty deposits/atheroma/ b arterial sclerosis/plaque deposits/blood clots; in walls of arteries;
Marks Examiners tips
2 You only need to describe one guidance in which high gear concentrations of cholesterol lead to disease of the arteries. It is strategic that you refer to the trim supply of oxygen to the cardiac vigor. This leads to stopping point of the cardiac muscle cells.
(ii) arrowing/blockage (of coronary n 3 max arteries) restricts/reduces blood flow to the heart; heart bonds reduced oxygen supply/is starved of oxygen; muscle dies/muscle does not contract; 2
(b) ewer people with very high cholesterol f levels; therefore contribution to total/ relational number of deaths lower;
This is really a feature of the way the data has been provided, i.e. number of deaths in a population.
2 (a) left field ventricle; (b) (i) left) ventricle/heart relaxes/diastole/ ( filling/not spotting; (ii) elastic tissue/wall; recoils/springs back (to main pressure);
1 1 2 A common error is to paint a picture that the pressure is maintained by muscle in the arterial wall. Any reference to this would disqualify the second mark point.
3 (a) ffective pee/sewage treatment/prevent e urine contamination/improve hygiene/ vaccination/quarantining of affected heavens; (b) ral rehydration therapy/ORT or oral o rehydration solution/ORS; replaces lost water and salts; OR drinking large amounts of water; with salts/minerals; (c) receptor/proteins on membrane; complementary shape of exotoxin; (d) (i) active transport; victimisation ATP/carrier proteins; (ii) igher solute concentration/water h strength lowered in small intestine; osmotic spill of water;
1
Any two of these ideas for one mark.
2
Many students acknowledgement the sugar used in ORT/ORS. This provides a source of respiratory substrate. The water helps rehydrate the body and the salts replace those that have been lost....If you want to get a full essay, order it on our website: Ordercustompaper.com
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