Bio Flashcards
Deffntion of osmosis
The movement of water from a high concentration to a low concentration through a semi permeable membrane
State the definition of diffusion
The movement of partials from a high concentration to a lower concentration
What is an animal cell eukaryotic or prokaryotic
Eukaryotic
Cytoplasm definition
A jelly like material and is where most chemical reactions take place
Nucles
Contains dna holds genetic material
Cell membrane definition
Controls what goes in and out of the cell
Mitochondria definition
Where energy is released for photosynthesis
Ribosomes definition
Where proteins are made
Things found in an plant cell which are not found in an animal cell
Permanent vacuole
Cell wall
Permanent vacuole definition
Filed with cell sap
Cell wall definition
Made from cellulose / strengths the cell and supports the plant
What is the difference between eukaryotic and prokaryotic cells
Eukaryotic cells DNA is linear
Whereas prokaryotic cells DNA is
Circular
What is a stem cell
A stem cell is an unidentified cell which can differentiate into any function needed in the body
Where are stem cells found
In the bone marrow
What is a stent
A stent is a metal mesh placed into the blocked conary artery which hold the blocked artery open so blood flow can be restored
What are statins
Stains are small tablets you can take if you have high blood cholesterol they are used to reduce your cholesterol levels
Advantage of stents
No responsibility of taking anything
Quicker results
Disadvantages of stents
Can get blood clots
Bleeding
Stroke
Tear inside your artery
Advantages of statins
No risks of blood clotting
Reduces risk of a stroke
Disadvantages of statins
Have to take everyday and cannot forget
Headaches
Digestive problems
How can a stent prevent a heart attack
Because your arteries are not built up with fatty material restricting the blood flow of oxygen through to your heart
The equation for calculating the size of an object
Magnification = Size of image |size of real object
Structures you would expect to find in a human cell
Ribosomes
Nucles
Cell membrane
Structures you would expect to find in a plant cell
Mitrocondriea
Permanent vacuole
Chloroplast
What functions are found in plant cells but not animal cells
Permanent vacuole
Chloroplast
Cell wall
Why is the Nucles so important in the cell
Because it holds all the genetic material and controls the activity of the cell
Why is the mitochondria so important in the cell
It creates energy to drive cellular functions
What kind of cell is a prokaryotic cell
It is a bacterial single-felled living organism it has a single DNA loop found free in the cytoplasm
Define what is meant by the flagella
Microscopic hair - like structure
What do eukaryotic cells have
Cell membrane
Cytoplasm
Genetic material included into the Nucles
What do prokaryotes cells consist of
Cytoplasm
Cell membrane
Cell wall
Single stand of DNA
What is a nerve cell
Nerve cells are speciled to carry electrical impulses around the body they provide rapid communication systems between the different parts of the body
