Biology END OF YEAR EXAM Revision Flashcards
Eyepiece
What you look through in a microscope
Stage
The platform where the slide is placed on a microscope
Low power objective lens
Small lens with low magnifying power
High power objective lens
Large lens with high magnifying power
Stage clips
Metal clips that hold a slide securely onto the stage on a microscope
Inclination joint
An adjustable joint that lets the arm tilt at various angles on a microscope
What are the two types of focus wheel on a microscope
Fine focus wheel, coarse focus wheel
Diaphragm (microscope)
An adjustable opening under the stage allowing different amounts of light onto the stage
Two types of microscope
Light microscope, electron microscope
Ribosome function
Make proteins
Cytoplasm is where…
…chemical reactions take place
Nucleus contains…
DNA
Mitochondria is where…
…respiration takes place
Cell membrane function
Controls what goes in and out of the cell
Chloroplast function
Photosynthesis
Cell wall function
Surrounds and protects the cell
Red blood cell function
Carry oxygen around the body
Red blood cell adaptations
Contains haemoglobin, no nucleus, large surface area
White blood cell function
Part of the immune system, fights diseases
White blood cell adaptation
Irregular shape to squeeze through blood vessels
Skin cell function
Creates a barrier between the body and the rest of the world
Skin cell adaptation
Creates keratin
Magnification =
Measured size
——————-
Actual size
Actual size =
Measured size
——————-
Magnification
Features of an animal cell
Nucleus, cytoplasm, cell membrane, mitochondria, ribosomes
Features of a plant cell
Nucleus, cytoplasm, cell membrane, mitochondria, ribosomes, cell wall, vacuole
Features of a bacteria cell
Cytoplasm, cell membrane, mitochondria, ribosomes, cell wall, slime capsule, flagella, plasmids, genetic material (not in nucleus), pili
Slime capsule function
Protects bacteria against antibiotics
Flagella function
Helps with movement
Plasmid function
Contains DNA
Pili function
Helps the cell to attach to other things
Catalyst
Speeds up chemical reactions
Enzyme
Biological catalyst
Salivary gland
Produces saliva, contains enzymes
Oesophagus
Carries food from mouth to stomach
Stomach
Churns food
Pancreas
Produces enzymes
Liver
Helps break down fats and old blood cells
Gallbladder
Produces bile
Small Intestine
Absorbs small food particles
Large intestine
Absorbs excess water
Physical digestion
Physically breaking down food eg. Teeth, stomach