Bio p1

• Rose black spot 


  A disease caused by a fungus which causes purple/black spots on leaves of rose plants
• What happens during rose black spot 


  The leaves turn yellow and drop off. This means less photosynthesis can happen so plant doesn’t grow well
• How can rose black spot be prevented

  Gardeners use fungicide or affected leaves need to be destroyed
• Health is 


  The state of physical and mental wellbeing
• what does plasma carry ?


  red and white blood cells

  food molecules

  waste products
• advantages of an artificial heart

  made by metal and plastics so this makes them less likely to be attacked by bodys immune system
• disadvantages of an artificial heart 


  surgery can lead to infection

  blood doesn’t flow as smoothly through them
• pros of vaccination 


  they help control communicable diseases

  epidemics can be prevented
• white blood cells 


  have a nucleus

  part of the immune system

  change shape to eat unwelcome microorganisms
• platelets are


  small fragments of cells with no nucleus
• platelets help


  blood clot at a wound - stops blood poring out
• job of red blood cells 


  carry oygen from the lungs to all the cells in the body and working muscles
• lipases are made 


  in the pancreas and small intestine
• proteases are made in

  the stomach, pancreas and small intestine
• the gills on fish are the 


  gas exchnage surface in fish
• gills on fish are

  made up of thin plates which give them a large surface area for gas to be exchanged
• what are plant roots covered in?

  millions of root hair cells
• example of carbohydrases


  amalyse
• amalyse is made in the

  salivary glands, pancreas and small intestine
• potential hazards in an experiment

  fire

  electricity

  chemicals
• communicable diseases 


  can be spread person to person - malaria and measles
• non communicable disease 


  can’t be spread person to person - coronary heart disease
• risk factors that cause diseases

  smoking

  obesity

  drinking
• what is coronary heart disease

  where laters of fatty material build up in the coronary arteries and cause them to become narrow
• what can coronary heart disease cause

  It can reduce blood flow to the heart and means less oxygen can get to it, This can result in a heart attack
• Belign tumours 


  Are masses of abn cells that stay in one place. They are not dangerous
• Malignant tumours 


  Can spread to other parts of body and cells break off and travel into bloodstream. They are dangerous
• Statins


  Drugs that can reduce the amount of cholesterol in the blood
• The circulatory system is made up

  blood

  blood vessels

  heart
• 4 main things transpiration is affected by

  air flow - more wind means faster transpiration

  temperature- higher temp means faster transpiration

  humidity

  light intensity
• stomach 


  digest food
• large intestine 


  absorbs water from undigested food leaving faeces
• liver 


  producea bile
• pancreas 


  produces digestive juices
• An organ system


  A group of organs working together to perform a similar function
• salivary glands


  produce digestive juices
• tissue 


  a group of similar cells that work together to carry out a function
• organ 


  A group of d tissues that work together to perform a certain function
• catalyst 


  A substance that increases the speed of a reaction
• Small intestine 


  Digests food and absorbs soluble food molecules like glucose