Cells Flashcards
what does the cell membrane do?
-Semi permeable
-Controls the substances passing in and out of the cell
what does the cytoplasm do?
-Supports organelles suspended in the jelly
-Where many chemical reactions happen
what does the nucleus do?
-Controls the activity of the cell
-Contains DNA
what does the cell wall do?
-Provides strength and supports the cell, i.e. it holds it up.
what do chloroplasts do?
-Contains chlorophyll and help the plant carry out photosynthesis.
what does the vacuole do?
-Stores dissolved substances
What is an organism?
A name given to living things
What is a unicellular organism?
a living organism that is made up of one cell
What is a multicellular organism?
an organism that consists of many cells specialised to carry out different functions
What is the role of ribosomes?
To make proteins, such as hair, skin and nails, enzymes, hormones and antibodies
What is the role of mitochondria?
Powerhouse of the cell
Where respiration occurs, which is the process that releases energy from the food we eat
What is chlorophyll?
Gives plants its green colour and allows the plant cell to carry out photosynthesis
What is a specimen?
a sample of cells taken for examination using the microscope
What is the calculation for magnification?
eyepiece x objective = overall magnification
Parts of an animal cell?
-Cell membrane
-Mitochondria
-Vacuole (?)
-Cytoplasm
-Nucleus
Parts of a plant cell?
-Nucleus
-Mitochondria
-Cell wall
-Cell membrane
-Chloroplast
-Vacuole
-Cytoplasm
Parts of the microscope?
-Eyepiece
-Objective lenses
-Nosepiece
-Stage clips
-Stage
-Diaphragm
-Light source
-Coarse adjustment knob
-Fine adjustment knob
-Base
Function of the eyepiece lense?
Magnification of x10
Function of objective lense?
Lenses of different strengths which can be used to magnify the image more clearly
Function of stage?
Where the slide is placed
Function of stage clips?
Holds the slide in place
Function of diaphragm?
Controls the amount of light that goes onto the microscope slide
Function of the light?
Projects light onto the slide to see the specimen more clearly
Function of the base?
Keeps the microscope from falling over
Function of the fine focus knob?
Used to focus the image so it is sharp and clear
Function of the coarse focus knob?
Used to focus the image to see it clearly
Function of the nosepiece?
Used to switch to a different objective lense
What stain is used on a plant cell?
iodine
Why are stains used on cells?
to be able to see the parts more clearly
What stain is used on an animal cell?
Methylane Blue
