bio paper 1

• Tissue


  A group of cells with a similar structure and function
• Organ


  A group of tissues working together for a specific function
• Organ system


  Organs grouped together to form organisms
• Main nutrients in food

  • Carbohydrates
  • Protein
  • Lipids (fats)
• Digestion


  1. Large food molecules broken down into small molecules by enzymes

  2. Small molecules absorbed into bloodstream
• Digestive system


  • Food chewed in mouth, enzymes in saliva begin digestion
  • Food passes down esophagus into stomach, enzymes and hydrochloric acid digest proteins
  • Food passes into small intestine, pancreas releases enzymes to digest starch, protein and lipids, liver releases bile to aid lipid digestion
  • Small food molecules absorbed into bloodstream in small intestine
  • Fluid passes through large intestine, water absorbed, feces released
• Products of digestion


  Used by body to build new carbohydrates, lipids and proteins, some glucose used in respiration
• 424 Followers 4 Following lillie parker @lillieparker_1134 AQA biology paper 1 and 2 notes
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• AQA biology paper 1 and 2 notes
• cells

  animal celIS

  • 
    

  > ·cytoplasm = where chemical reactions cakes place

  • > cell membrane = controis what goes in and out the cell

  nucieus : contains genetic DNA

  mitochondria = acrobic respiration cakes place.

  Planc CCIIS

  .

  ·7 (C11 wall = heips. proiect cell

  ·› cell membrane = semi perabic membranc

  cytoplasm

  • > vacuole

  ·> Chloroplast

  "mitochondria = arcobic respiration takes place.

  nucicus = controis cells activities + contains DNA

  pronaryocic cells -no nucicus

  (cukaryotic cells -> nucieus

  Osmosis -> airfusion of water molecules from a nigh concentration

  to an area of low concentracion. Ehrough a partially.

  Permable membrane.

  diffusion -> movement of substances from an area of nign concentr.

  acion co low concentration.

  • cell organisation - digestive system, neare + blood.cancer..

  and transpiration.

  active transport -> movement of substances from a lower content-

  higher concentration across a

  ration LO a

  semi-permadie mcmbrane.

  digestive system

  mouth -> Physically breaus down by chewing

  • Ocsophagus ->
  • > Food passes through and into our stomach.

  Stomach -> muscullar wall breaus down food. development of drugs

  Clinical trials.

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  triais

  PEMEĠISA MÔŽIČE

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  Passed stage one are later tested on animals

  that have passed the animal tests are used in clinical

  voient cers donulunou

  • doctors unou.

  double blind.

  • volenteers dont know
  • doctors dont unou

  Placcbo -> looks like the treatment but isnt smaller intestine -> where digested food will be absorbed into the... Can't find what you're looking for? Explore other subjects. Knowunity is the #1 education app in five European countries Knowunity has been named a featured story on Apple and has regularly topped the app store charts in the education category in Germany, Italy, Poland, Switzerland, and the United Kingdom. Join Knowunity today and help millions of students around the world. Download in Google Play Download in App Store Still not convinced? See what other students are saying... iOS User I love this app so much, I also use it daily. I recommend Knowunity to everyone!!! I went from a D to an A with it :D Philip, iOS User The app is very simple and well designed. So far I have always found everything I was looking for :D Lena, iOS user I love this app ❤️ I actually use it every time I study.
• Cytoplasm


  Where chemical reactions take place
• Cell membrane


  Controls what goes in and out of the cell
• Nucleus


  Contains genetic DNA
• Mitochondria


  Where aerobic respiration takes place
• Cell wall


  Helps protect the cell
• Semi-permeable membrane


  Cell membrane
• Vacuole


  Cell organelle
• Chloroplast


  Cell organelle
• Prokaryotic cells


  Cells without a nucleus
• Eukaryotic cells


  Cells with a nucleus
• Osmosis


  Diffusion of water molecules from high to low concentration through a partially permeable membrane
• Diffusion


  Movement of substances from high to low concentration
• Cell organisation includes digestive system, heart, blood, cancer, and transpiration
• Active transport


  Movement of substances from low to high concentration across a semi-permeable membrane
• Digestive system


  1. Mouth physically breaks down food by chewing

  2. Oesophagus - food passes through to stomach

  3. Stomach - muscular wall breaks down food
• Drugs are tested on human cells in labs first
• Drug development


  1. Drugs that pass stage one are later tested on animals

  2. Drugs that pass animal tests are used in clinical trials

  3. Clinical trials are double blind - volunteers and doctors don't know who gets the real treatment