AS content for assessment 2
- Created by: Emilyburkee
- Created on: 05-05-21 10:38
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- AS content- assessment 2
- cancer and the cell cycle
- describe how uncontrolled cell division can lead to formation of tumors and cancer
- damgaed genes or mutated genes can effect the control of cell cycle
- this leads to uncontrolled cell divison leading to the formation of a group of abnormal cells -tumor
- damgaed genes or mutated genes can effect the control of cell cycle
- explain how cancer treatments often inhibit stages of the cell cycle
- disrupt either DNA replication
- or inhibits metaphase by preventing spindle fibre formation
- by interuping both or either of these processes it prevents the cell from dividing futher
- stops the growth of the tumour
- disrupt either DNA replication
- describe how uncontrolled cell division can lead to formation of tumors and cancer
- the Heart
- explain the purpose of the AV valve the semilunar valve and the role of the coronary artiey
- the AV valve prevents backflow of blood into the atria
- when the pressure in the atria exceeds that in the ventricles the valve opens
- the semilunar valves prevent blood from flowing back into the ventricles
- when pressure in the ventricles exceeds that in the aorta valve opens
- the coronary arties supply the heart muscles with blood and materials for respiration
- the AV valve prevents backflow of blood into the atria
- coronary output = SV x HR
- required practical - key points
- Aim= identify structural features
- when trying to open valves -run water into arteries- semilunar should close
- applying gentile pressure will open valves
- safe use of equpitment
- place in beacker of disnfectant
- heart placed in disposable bags
- disinfect desk ect
- risk
- infection - wear lab coat, wear gloves + safely dispose of them and towels - wash hands
- cutting yourself -handle carefully
- scientific drawings - title, sharp pencil not colouring or shading proportions = accurate
- explain the purpose of the AV valve the semilunar valve and the role of the coronary artiey
- cancer and the cell cycle
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