Active transport
def
The transport of molecules against their concentration gradient from a region of low concentration to a region of high concentration
Key Terms
Active transport
def
The transport of molecules against their concentration gradient from a region of low concentration to a region of high concentration
Aerobic respiration
def
Respiration that requires oxygen
Agar jelly
A gel made from algae, which provides an ideal growth medium
Amino acid
def
The building blocks that make up a protein molecule
Anomaly
def
A result that is unusual or unexpected
Blood plasma
def
The liquid part of the blood containing useful things like glucose, amino acids, minerals, vitamins (nutrients) and hormones, as well as waste mate...
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| Term | Definition |
|---|---|
Active transport def | The transport of molecules against their concentration gradient from a region of low concentration to a region of high concentration |
Aerobic respiration def | Respiration that requires oxygen |
Agar jelly | A gel made from algae, which provides an ideal growth medium |
Amino acid def | The building blocks that make up a protein molecule |
Anomaly def | A result that is unusual or unexpected |
Blood plasma def | The liquid part of the blood containing useful things like glucose, amino acids, minerals, vitamins (nutrients) and hormones, as well as waste materials such as urea |
Boiling tube | Large test tubes made of toughened glass which can be heated on a Bunsen burner |
Cell membrane def | A selectively permeable membrane surrounding the cell and controlling the entry and exit of materials |
Cell sap def | The liquid transport system of plants, which is mainly water with dissolved salts and sugars |
Cell wall def | Outer structure which provides support and prevents the cell from bursting from the uptake of water by osmosis. Plant, fungal and bacterial cell walls have different structures and chemical compositions |
Cellulose def | A carbohydrate. It forms the cell wall in plant cells |
Concentration def | The concentration of a solution tells us how much of a substance is dissolved in water. The higher the concentration, the more particles of the substance are present |
Concentration gradient def | The difference in the concentration of a chemical across a membrane |
Diffusion def | The movement of molecules from an area of higher concentration to an area of lower concentration |
Humidity def | The amount of water vapour in the atmosphere measured as a percentage |
Interpolate def | To estimate unknown values from existing data |
Ion def | Electrically charged particle, formed when an atom or molecule gains or loses electrons |
Light microscope | Device that uses visible light and a series of lenses to produce an enlarged image of an object |
Microorganism def | Microscopic (too small to see) organisms, such as bacteria and viruses |
Molecule def | A collection of two or more atoms held together by chemical bonds |