Late night revision Flashcards
What is osmosis
The movement of water molecules across a partially permeable membrane from an area of high water concentration to an area of low water concentration
What is diffusion
The spreading out of particles from an area of higher concentration to an area of low concentration
Where does diffusion occur
in gaseous exchanges
What is active transport
A process that moves molecules across a cell membrane from a region of low concentration to a region of high concentration
Where does active transport occur
Active transport occurs in
1. Plants
2. Plant cells
What is the nucleus
controls the activity of the cell
what is cytoplasm
A gel like substance where chemical reactions occur
What is the cell membrane
Holds the cell together
What is mitochondria
aerobic respiration occurs
respiration transfers energy
What are Ribosomes
Where proteins are made in the cell
1.What cell is the cell wall in
2. What’s its roll
- Only in a plant cell
- Supports and strengthens the cell
what is a permanent vacuole
it’s a cell sap- a weak solution of sugar and salts
What happens in chloroplast
Photosynthesis occurs
what is differentiation
a process by which a cell becomes specialised for its jobs
Put these 4 into order of smallest to largest
1.Organ. 2.Tissues. 3.Organ system 4.Cells
- Cells
- Tissues
- Organ
- Organ system
