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4288108
Cells, Organs and Populations
Descripción
Biology 2A
Sin etiquetas
cells
diffusion
specialised cells
cell organisation
biology
gcse
Mapa Mental por
l.tarawally19
, actualizado hace más de 1 año
Más
Menos
Creado por
l.tarawally19
hace casi 9 años
15
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Resumen del Recurso
Cells, Organs and Populations
Animal cell
Nucleus
Cytoplasm
Cell membrane
Ribosomes
Mitochondria
Plants
Contains all features of animal cell
Permanent Vacuole
Permanent Vacuole
Choloroplast
Yeast
Is a single celled microorganism
Bacteria
Cell Wall
Cytoplasm
Cell Membrane
Genetic Material
Replaced Nucleus
Ribosomes
Cytoplasm
Cell membrane
Nucleus
Diffusion
Net movement of particles of high concentration to low oncentration
bigger difference in concentration = faster diffusion
shorter the difference particles travel = quicker the diffusion
greater the SA particles diffuse across = quicker the rate of diffusion
Occurs in solution and gases
Particles are free to move
Diffusion occurs in cells
Cell Membrane
Small substances can diffuse through CM
Amino Acids
Water
Glucose
Let things in and out of cell
Big molecules cannot diffuse
Starch and Proteins
Specialised Cells
Palisade Leaf adapted for photosynthesis
Packed with chloroplast
Upper part of leaf to absorb light
Tall shape = a lot of surface area
Thin shape = space for loads at the top as columns
At the top where photosynthesis happens
Guard Cells
Kidney shape opens and closes stomata in leaf
Lots of water
Plump and Turgid
Stomata opens so gases are exchanged for photosynthesis
Short of water
GC lose water and become flacicid
Makes stomata close stoppnig water vapour leaving
Thin outer walls and thickened inner walls
Allows opening and closing
Controls gas exhange and water loss
Red Blood Cell
Conclave shape + big surface area and easy pass in capillaries
Packed with haemoglobins which absorb oxygen
No nucleus = MORE haemoglobins
Adapted to carry oxygen
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