Biology 1.1

Created by

Sienna thomas

Cards (63)

Components of a plant cell
Nucleas
cell wall
cell membrance
cytoplasm
mitrochondria
vacoule
Components of animal cell
Nucleas
cell membrance
mitrochondri
cytoplasm
Function of Nucleas
Stores genetic information
Function of cytoplasm
Site of celluar reactions
Function of cell membrane
Controls energy and exit of materials in and out of the cell
Function of cell wall  
Provides structure
What is the cell wall made up of
Cellulose
function of mitochondria
Site of aerobic respiration in which Atp is produced
Function of the permanent vacuole
Supports the cell
What does the permanent vacoule contain
Cell sap a solution of salts, sugars and organic acids
Function of chloroplast
Site of photosynthesis
What peice of equipment is is used to observe a plant and animal cells
A microscope
how Does a light microscope work?
Passes a beam of light through a specimen which travel to the eyepeice lens allowing the specimen to be observed
Describe the path way of Light through a light microscope
Lamp-condenser-specimen-objective lens-eyepiece lens-eye
What is the eye piece lens magnification
X10
What is the objective lens magnification
X40
How do you work out the total magnification of a micoscope
eyepiece lens x objective lens
Why do we stain the onion tissue before viewing
To enhance visibility
What do we use to stain cheek cells before viewing under a microscope
Methylene blue
Function of the iris diaphragm
Adjust the amount of light which passes through the specimen and enters the objective lens
Function of the condenser
Focuses light onto the objective lens
Function of the fine focus control
Used to finely adjust the focus of an image
What is cell differentiation
Process which unspecialised cells (stem cell) become specialised to have a specific function
Why is cell differentiation important
Enables the formation of specialised cells with specific functions
What is a tissue
A group of similar cells working together to perform a specific function
What is an organ
A group of tissues working together to perform specific function
What is an organ system
A group of organs which work together to perform a particular function
What is an organism
A living thing that is able to function independently
What are cells  
Small units of life
What do specialised cells do
They can diffientate into specialised cells
What makes them specialised cells
They are more effiective at carrying out a specific function
What are cillias and what do they do
That are tiny microscopic hairs that sweat mucus out of the lungs
How does diffusion happen
When molecules of gas or liquid spread out
Definition of diffusion
Movment molecules from an area of high concentration to an area of low concentration down a concentration gradient
Diffusion does not require energy as it is a passive process
Oxygen moves into cells by diffusion and diffuses across the cell membrane.
Carbon dioxide moves out of cells by diffusion and diffuses across the cell membrane.
What size substances diffuse in and out of our body
Substances must be small enough to pass through the semi permeable membrane
Larger molecules cannot pass through the pores in the membrane.
The cell membrane is a semi-permeable membrane