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What is the function of the Plasma Membrane?
Allows selective passage of substances in and out of the cell
What is a semmi/partially/differentially permeable membrane?
A boundary that allows only some materials to pass through it
Movement of a solute from an area of high concentration to an area of low concentration
Define Facilitated Diffusion
Form of diffusion involving a specific carrier molecule for the substance that diffuses
Movement of water from an area of high free water concentration to an area of low free water concentration
Define Active Transport
Movement of a solute from an area of low concentration to an area of high concentration
Define Bulk Transport
Active Transport of large molecules or molecules required in large amounts, via means of vescile formation
What way (down or up) does the transport occur on the concentration gradient when talking about PASSIVE transport?
Down (from high to low solute concentration)
What way (down or up) does the transport occur on the concentration gradient when talking about ACTIVE transport?
Up (from low to high solute concentration)
What is the function of the Nucleus?
Contains genetic mmaterial which contains instructions for the cell
What is the function of the Cell Membrane?
Controls the movement of substances into and out of the cell
What is the function of the Vacuole?
Used for storing substances, maintaining water, sugar and pigments in plants
What is the function of the Cytoplasm?
Some chemical reactions take place and suspend organisms. Fluid with organelles.
What is the relationship between cell tissues, organs and organ systems?
Groups of similar cells form tissues > Groups of tissues form organs > groups of organs form organ systems > organ systems make up the whole organism
What is meant by the surface area to volume ratio?
Relative amount of surface area avaliable per unit of volume
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