chapter 1 :cells Flashcards
what is the function of Smooth Endoplasmic reticulum ?
-to synthesise fats and hormones
-detoxification of harmful substances
what is the function of centrioles?
involved in cell division
what is the function of rough endoplasmic reticulum ? Contain ribosomes attached to surface to synthesise proteins or for detoxification of harmful substances ?
contains ribosomes attached to surface to synthesise proteins
what is the function of golgi apparatus ?
.chemically modifies substances made by endoplasmic reticulum
.store and package these substances in vesicles to be secreted out of cell
what does mitochondria look like ?
.oval-shaped
.small(cannot be seen with light microscope)
.Double-membrane
describe the size and number of the vacuole in an animal cell
small vacuoles and more than 1
describe the size and number of the vacuole in a plant cell
One large vacuole in the central
does an animal cell have a cell wall?
No
what are the 3 structural traits of root hair cell? And how does each structural trait help the cell to perform its function?
.Has a long,narrow extension->Increases surface area to volume ratio to allow faster absorption of water and mineral salts
.Has concentrated cell sap inside vacuole->increases concentration gradient to allow faster absorption of water and mineral salts
.Has a large vacuole->to store more water inside vacuole so that more water can be absorbed
what are the structural traits of muscle cell?and how does each trait help the cell to perform its function ?
.contains many mitochondria->allows respiration to occur at a higher rate to release a large amount of energy for contraction of muscle cell
.has contractile protein fibres->contract and relax to bring about movement
.has many nuclei->allows for cell division so damaged cells can be quickly replaced
