Flashcards
Key terms
Cards in this deck (34)
- 1osmosisThe net movement of water molecules from a higher water potential to a lower water potential through a semi-permeable membrane.
- 2hypotonic solutionwhere there is a greater concentration of solutes inside the cell than outside
- 3hypertonic solutionwhere there is a greater concentration of solutes outside the cell than inside
- 4isotonic solutionwhere the concentration of solutes is equal inside the cell and outside
- 5dependant variableis the one that you measure, it depends on the independent variable
- 6independent variableis the one that you change
- 7flaccida plant cell that is limp (has lost water)
- 8turgida plant cell that is fully inflated with water
- 9plasmolyseda plant cell that has lost water, causing the cell membrane to pull away from the inside of the cell wall
- 10crenationshrinking an animal cell by osmosis
- 11lysisbursting an animal cell by osmosis
- 12angiospermsflowering plants
- 13gymnospermsconifers
- 141 millimeter =1000 micrometers
- 151 micrometer =1000 nanometers
- 16reducing sugarany sugar that is capable of acting as a reducing agent because it has a free aldehyde group or a free ketone group
- 17interspecific and intraspecific variationinterspecific is between different species
intraspecific is within a species - 18continuous and discontinuous variationcontinuous is a measurable value (height)
discontinuous is categorised data (colour) - 19mitosis (name and explain the stages)
- 20meiosiscell division that results in four daughter cells each with half the number of chromosomes of the parent cell, as in the production of gametes and plant spores
- 21active and passive immunityactive is when the immune system produces it's own antibodies,
passive is when antibodies are transferred from an outside source - 22endocytosis and exocytosisendocytosis is bringing substances into the cell (pinocytosis and phagocytosis)
exocytosis is secreting membrane-bound vesicles of molecules out of the cell - 23phagolysosomea combined phagosome and lysosome formed during phagocytosis
- 24opsoninchemicals the bind to pathogens so they can be more easily recognised by phagocytes
- 25phagosomea vacuole enclosing a pathogen that has been engulfed by a phagocyte
- 26cytolosisbursting of a animal cell caused by a hypotonic solution
- 27erythrocytesred blood cells
- 28neutrophilsa type of white blood cells that form an essential part of the innate immune system
- 29intra interintra in within
inter is between - 30etiolationplants having long, weak stems and a pale yellow colour caused by skotomorphogenesis (the development of seedlings in the dark)
- 31chlorosisyellowing of leaves of plants, caused by iron or magnesium deficiency or other factors
- 32rare and common blood typesAB negative is the rarest
O positive is the most common - 33apoptosisa form of programmed cell death that occurs in multicellular organisms.
- 34macromoleculea very large molecule like a protein commonly composed of monomers
Information
- Description
- Flashcards for biological definitions relating to the OCR A-level biology specification.
- Created by
- Emily Rowland-Rawson
- Views
- 42
- Tags
- Rating