basic unit which living organisms built. specialised for particular function
tissue?
group of cell types that work together to carry out one function
organ?
group of differenttissues working together to carry out functions
organ system?
group of different organs working together for same function
what are adhesion molecules?
proteins/glycoproteins found on cell membrane. molecules have complementary shapes and bind to each other through tissue fluid that surrounds cells
what are receptor molecules?
? proteins inside a cell that receive a signal
what are master genes?
control development of segments of organisms. produce mRNA that translates to signal proteins (switching on genes responsible for producing proteins needed)
what is apoptosis?
programmedcell death, healthy animal cells die during normal development of an organism
