cell structures Flashcards
what are prokaryotic cells?
for single-celled organisms + have only cytoplasm & cytosol
what are eukaryotic cells?
for multicellular organisms & have membrane bound nucleus, organelles & cytoplasm
“organelles”
membrane bound compartments of the cell
animal cell ultrastructures?
nuclear pore, nucleus, nucleolus, Golgi body, cell surface membrane, microtubules centriole, mitochondria, RER, SER
“nuclear pore”
gaps that allow small molecules to move in and out the nucleus
“nucleus”
stores genetic information of the cell as DNA
“nucleolus”
- where, what made of, what does it do
inside nucleus, composed of proteins + RNA, responsible for ribosome biogenesis (creation)
“nuclear envelope”
double membrane protecting DNA from damage by cytoplasm
“mitochondria”
site of cellular respiration
mitochondria structure?
double membrane - inner membrane (cristae) fluid interior (matrix)
reproduce on town + produce own enzymes etc
“vesicles”
single-membranous sacs that have storage and transport roles
“lysosomes”
specialised vesicles that contain hydrolytic enzyme
responsible for breaking down waste materials
“cytoskeleton” + 3 components
network of fibres necessary for shape & stability in all eukaryote cytoplasms
- microfilaments
- microtubulues
- intermediate fibres
“microfilaments”
contractile fibres formed from actin responsible for cell movement and contraction during cytokinesis
“microtubules”
tubes forming scaffold like structures determining shape of cell + track movement of organelles around cell
spindle fibres r made from microtubules
“intermediate fibres”
give mechanical strength to cells and help maintain integrity
