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9T1 Cells and Moving Molecules - Coggle Diagram
9T1 Cells and Moving Molecules
Level of organisation
Organelles - Specialised structures found within living cells
Cells - basic structural unit of a living organism
Tissues - a group of cells of the same type that carry out a function
Organs - A group of tissues (of different cell types) working together to carry out a function
Organ system - A group of organs working together to carry out a function
Cell structure
Nucleus - Contains DNA which controls protein synthesis - Plant and Animal
Cytoplasm - Site of metabolic reactions including anaerobic respiration - Plant and Animal
Cell Membrane - Partially permeable membrane that controls entry and exit of substances in and out of cells - Plant and Animal
Cell wall - provides support to plant cells - Plant only
Chloroplast - Site of photosynthesis - Plant only
Vacuole - Controls water content of cells and store of dissolved sugars - Plant only
Mitochondria - Site of aerobic respiration - Plant and Animal
Ribosomes - Site of protein synthesis - Plant and Animal
Specialised cells are those which have developed certain characteristics in order to perform particular functions
Movement of substances in and out of cells
Diffusion - the passive movement of molecules from a high concentration to a low concentration down a concentration gradient
Osmosis - the movement of water from a dilute solution to a more concentrated solution through a partially permeable membrane
Factors that effect the rate of movement of molecules in and out of cells
Surface area to volume ratio - the larger the SA:VOL ratio the greater the rate of movement
Temperature - The higher the temperature the faster the rate of movement however if the temperature is too high then the enzymes will denature
Concentration gradient - The steeper the concentration gradient the faster the rate of movement
Distance - the smaller the diffusion distance the faster the rate of diffusion