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GCSE B2.1 Cells, tissues and organs
Descripción
Mapa Mental sobre GCSE B2.1 Cells, tissues and organs, creado por Will Darby el 07/10/2015.
Sin etiquetas
gcse
science
aqa
biology
b2
b2.1
b21
as level
Mapa Mental por
Will Darby
, actualizado hace más de 1 año
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Creado por
Will Darby
hace casi 9 años
15
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Resumen del Recurso
GCSE B2.1 Cells, tissues and organs
1.1 Animal and plant cells
All living things are made from cells
Most cells have some structures in common
Plant cell
Nucleus
Cytoplasm
Cell membrane
mitochondria
Ribosomes
Animal cell
Ribosomes
Mitochondria
Cell membrane
Cytoplasm
Nucleus
Cell wall
Chloroplasts
Permanent vacuole
Plant and animal cells are different because they have different fuctions
1.2 Bacteria and yeast
Bacteria
Bacterial cells contain
Cell membrain
Cell wall
Cytoplasm
Plasmids
Flagella
No nucleus so the genetic material is stored in the cytoplasm
When bacteria multiplies it forms a colony
Yeast
Single-celled organism
Yeast cells contain
Nucleus
Cytoplasm
Membrane
Cell wall
1.3 Specialised cells
As an organism matures, each cells develops to have their own fuction
There are many different types of cell
Root hair cell
Sperm cell
Look at the structures of the cell for a clues about its function
1.4 Diffusion
Molecules in gases and liquids move around randomly because of the amount of energy they have
Diffusion is the spreading out of gas, or any substance in a solution
Concentration gradient - the difference in concentration between two areas is called the
Because particles more randomly, there will be a net movement from an area of high concentration to an area of low concentration
The larger the difference in concentration, the faster the rate of diffusion
1.5 Tissues and organs
Tissues
A tissue is a group of cells with a similar structure and function
Animal tissues
Muscle tissue - contracts to bring about movement
Glandular tissue - produces substances like enzymes or hormones
Epithelial tissue - Covers some parts of the body
Plant tissues
Epidermal tissue - Covers the plant
Mesophyll - can photosynthesise
Xylem and phloem - transport substances around the plant
Organs
Organs are made of tissue
The stomach is an organ made of muscular, glandular and epithelial tissues
1.6 Organ systems
Groups of organs work together to make an organ system
One example is the digestive system
The digestive system turns insoluble molecules into soluble molecules so it can be absorbed into the blood
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