Cell Processes

Mind Map by georgia_rae, updated more than 1 year ago
Created by georgia_rae over 5 years ago


overview on the cell processes content in NCEA level two bio

Resource summary

Cell Processes
1 Diffusion
1.1 Passive transport
1.1.1 No energy required
1.2 semi-permeable membrane
1.2.1 Stucture Hydrophilic head Hydropholic tail Phospholipid Layer
1.3 movement from area of high concentration to area of low concentration
1.3.1 down the concentration gradient
1.4 Example: Carbon dioxide for photosynethesis
1.5 Factors that effect diffusion
1.5.1 Concentration Gradient Diffusion rates will be higher when there is a greater difference in concentration between the two regions
1.5.2 Diffusion Difference Diffusion over shorter distances occurs at a greater rate than larger distances
1.5.3 Surface Area The rate of diffusion is greater when there is a large surface area across where diffusion occurs
1.5.4 Physical Barriers Thick barriers slow the rate of diffusion Pores in a barrier enhance the diffusion
2 Facilitated Diffusion
2.1 Semi-permeable membrane
2.2 Passive transport
2.2.1 No energy required
2.3 Same as diffusion but assisted by carrier protein
2.4 Example: Glucose
2.5 Movement from an area of high concentration to an area of low concentration
2.5.1 Down the concentration gradient
3 Osmosis
3.1 Movement of water from area of high concentration to an area of low concentration
3.1.1 Down concentration gradient
3.2 Passive transport
3.2.1 no energy required
3.3 Example: water in the soil will move into the cell
3.4 Osmoregulation
3.4.1 Isotonic Solutions: no net loss or gain
3.4.2 Hypertonic Solutions: net loss Animal: shrivel up Plant: plasmolysed and flaccid
3.4.3 Hypotonic Solutions: net gain Animal: Expand and burst Plant: turgid (tugor pressure)
4 Active Transport
4.1 semi-permeable membrane
4.2 Movement from an area of low concentration to an area of high concentration
4.2.1 Against concentration gradient
4.3 Energy is required
4.4 Transport or carrier proteins are needed
4.5 Types
4.5.1 Sodium-potassium pump
4.5.2 Proton pumps
4.5.3 Cytosis
4.6 Example: use ATP energy to move h+ ions in respiration
5 Enzymes
5.1 Biological catalyst that speeds up specific chemical reactions
5.1.1 Lower energy barrier - activation energy
5.2 The lock and key model
5.3 Induced fit
5.4 Factors that effect enzyme reaction rate
5.4.1 Temperature Increases until optimum temperature then decreases as the enzymes denature Denature is when the weak hydrogen bonds of the active site break
5.4.2 pH value optimum temperature then denature
5.4.3 Enzyme concentration increases
5.4.4 Substrate concentration Increases then reaches saturation point
5.5 Proteins
5.6 Poisons when in wrong part of body
6 Respiration
6.1 The process of breaking down food and using oxygen to produce energy in the form of ATP
6.2 Aerobic respiration
6.2.1 Glucose + Oxygen = carbon dioxide + water + lots of ATP
6.2.2 Efficient
6.3 Anaerobic respiration
6.3.1 Glucose = Carbon dioxide + lactic acid + water +little ATP
6.3.2 Lactic acid build up in muscle and causes cramp
6.3.3 Less efficient
6.4 Mitochondria
6.4.1 The organelle where respiration occurs
6.4.2 Outer membrane semi-permeable
6.4.3 Cristae, folded inner membrane increase in surface area which allows respiration to be efficient and faster as number of reactions have increased
6.4.4 Matrix, fluid High concentration of enzymes increase in reactions
6.5 Factors
6.5.1 Temperature optimum temperature
6.5.2 Body's enrgy demand rate of respiration will increase to maximum as the demand increases
6.6 Stages
6.6.1 Glycolysis
6.6.2 Krebs cycle
6.6.3 Electron transfer chain
7 Photosynthesis
7.1 Equation: water + carbon dioxide + sunlight+ chlorophyll= glucose and oxygen
7.2 Factors
7.2.1 Temperature increases to optimum then denature
7.2.2 Light intensity increases rate to max. then no affect
7.2.3 CO2 concentration increases to max. then no affect
7.3 Chloroplast
7.3.1 stroma, fluid clear, doesnt block sunlight maxmising penetration light
7.3.2 Grana stack of thylakoids thin, disc shape, short diffusion distance increase surface area
7.3.3 outer and inner membrane transparent to allow max sunlight
7.4 Stages
7.4.1 light independent stage
7.4.2 light dependent stage
Show full summary Hide full summary


Photosynthesis and Respiration
Jessica Phillips
Biology AQA 3.1.3 Cells
GCSE AQA Biology - Unit 2
James Jolliffe
Cells and the Immune System
Eleanor H
Biology Unit 2 - DNA, meiosis, mitosis, cell cycle
Function and Structure of DNA
Elena Cade
Cell Transport
Elena Cade
Cell Structure
Selam H
Edexcel Biology chapter 1
Anna Bowring
OCR AS Biology