Key term
Edexcel GCSE Combined Science Biology 1SC0
Key Concepts in Biology
Topic overviewEukaryotic and prokaryotic cellsSpecialised cells and their adaptationsMicroscopes and magnification calculationsSize, scale and units in cell biologyEnzyme action and denaturationFactors affecting enzyme activityEnzymes in synthesis and digestion, and rate calculationsDiffusion, osmosis and active transportOsmosis in potatoes and percentage change in mass
Cells and Control
Genetics
Topic overviewMeiosis and the formation of gametesDNA structure, genes and the genomeExtracting DNA from fruitAlleles, genotype and phenotypeMonohybrid crosses and sex determinationProbability and ratios from genetic crossesCauses of variation: genes and environmentThe Human Genome ProjectGenetic variation and the effects of mutation
Natural Selection and Genetic Modification
Health, Disease and the Development of Medicines
Topic overviewHealth, disease and susceptibilityPathogens and common infectionsHow pathogens spread, and the virus life cycleSexually transmitted infectionsPhysical barriers and chemical defencesThe immune system, immunisation and herd immunityAntibiotics and developing new medicinesLifestyle factors and non-communicable diseaseTreatments for cardiovascular disease
Plant Structures and Their Functions
Animal Coordination, Control and Homeostasis
Exchange and Transport in Animals
Topic overviewWhy multicellular organisms need exchange surfacesAlveoli and gas exchangeThe blood and its componentsArteries, veins and capillariesThe heart and the circulatory systemCellular respiration as an exothermic reactionAerobic and anaerobic respiration comparedInvestigating the rate of respirationCardiac output, stroke volume and heart rate
Ecosystems and Material Cycles
Health, Disease and the Development of Medicines
Treatments for cardiovascular disease
- 3 things to know
- Paper 1
Overview
Statins, anticoagulants, stents, coronary bypass operations, lifestyle change and heart transplants as treatments for cardiovascular disease, the advantages and disadvantages of each, and when lifestyle change alone is not enough.
What you need to know
Answer each one before you reveal it.
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Key term
Describe what a stent does.
Key term
Describe what happens in a coronary bypass operation.
Questions from this subtopic
Each one with the model answer underneath.
- 1
Name one medicine taken for life to lower the risk of cardiovascular disease, and state what it does.
Model answer
Statins, which lower the level of cholesterol in the blood.
- 2
Give one advantage and one disadvantage of taking statins.
Model answer
They reduce cholesterol and so lower the risk of a heart attack, but they can cause side effects such as muscle pain.
- 3
Explain how anticoagulant medication reduces the risk of a heart attack.
Model answer
It makes the blood less likely to clot, so the arteries supplying the heart are less likely to become blocked.
- 4
Describe what a stent does.
Model answer
A stent is a mesh tube placed inside a narrowed artery to hold it open so that blood can flow freely again.
- 5
Give one advantage and one disadvantage of fitting a stent.
Model answer
It restores blood flow quickly and lasts a long time, but the operation carries risks such as infection and clotting around the stent.
- 6
Describe what happens in a coronary bypass operation.
Model answer
A blood vessel taken from elsewhere in the body is used to carry blood around a blocked section of a coronary artery.
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