B1-cell biology
- Created by: Grace.barnett
- Created on: 23-03-18 19:35
View mindmap
- Biology B1
- cells
- plant cells
- 1- nucleus 2- cytoplasm 3-cell membrane 4-mitrochondria 5-Ribosomes 6-rigid cell wall 7-permanent vacuole 8-ribosomes
- animal cells
- 1- nucleus 2- cytoplasm 3-cell membrane 4-mitrochondria 5-Ribosomes
- bacteria cells
- 1-cell membrane 2-cytoplasm 3-cell wall 4-plasmids
- plant cells
- microscopy
- magnification=image size / real size
- standard form= a number between 1 and 10 x 10 to a power
- cell differentiation and specialisation
- cells differentiate to become specialised
- sperm cells are specialised for reproduction
- nerve cels are specialised for rapid signalling
- muscle cells are specialised for contraction
- root hair cells are specialised for absorbing water and minerals
- phloem and xylem cells are specialised for transporting substances
- cells differentiate to become specialised
- chromosomes and mitosis
- chromosome contain specialist genetic information
- cell cycle; 1-growth & DNA replication 2-mitosis
- stem cells
- embryonic stem cells can turn into any type of cell
- stem cells may be able to cure many diseases
- stem cells can produce identical plants
- diffusion
- diffusion= the spreading out of particles from an area of higher concentration to an area of lower concentration
- exchange surfaces
- surface area= length x width
- cells can use diffusion to take in substances they need and get rid of waste products.
- active transport
- root hairs take in minerals and water using active transport
- exchanging substances
- gas exchange happens in the lungs
- the job of the lungs is to transfer oxygen to the blood and to remove waste carbon dioxide
- the villi provide a really large surface area
- gas exchange happens in the lungs
- osmosis
- osmosis= the movement of water molecules across a partiallypermeable membrane from a region of higher water concentration to a region of lower water concentration
- cells
Comments
No comments have yet been made