lecture #6 Flashcards
1
Q
what is cell theory
A
- cell smallest unit of life
- cells make up all living things
- new cells arise from pre-existing cells
2
Q
why did hooke call the cell , cell
A
because of the small rooms
3
Q
why are cells limitated in size
A
surface area to volume ratio !
volume increases faster then surface area
metabolic demands are determined by volume, but transport of materials is determined by surface area
if volume increases, cells needs increase too, but surface area does not increase much, so ;
cells have more metabolic needs, but less surface area to exchange metabolites with outside environment
