Cell Biology 1.1 Flashcards
what are the exceptions of cell theory?
1) skeletal muscles- cells fuse to form muslce fibers, impossible to know where they start/end
2) giant algae (mermaid’s wineglass)- made up of 1 cell (7cm)
3) aseptate fungus: no cell walls, cytoplasm is continous with many nucleo
what are the 3 statements of cell theory?
1) living organisms are are composed of cells
2) cells are the smallest unit of cell
3) cells come from pre-existing cells
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image size/actual size
what are the fuctions of living organism?
1) nutrition
2) metabolism
3) growth
4) response
5) excretion
6) homeostasis
7) reproduction
binary fission is…
the process where prokaryotic cells divide
1) DNA is replicated
2) the cell elongates, each cell has a copy of the DNA
3) the cell divides
4) 2 identical cells are formed
nutrition is:
obtaining food to provide energy and materials needed for growth
metabolism:
sustained by chemical reactions that take place inside their cells including respiration to release energy
growth:
an irreversible increase in size
response:
perceiving and reacting to changes in the environment
excretion:
the release of waster chemicals formed inside of cells
homeostasis:
keeping conditions inside the organism within tolerable limits
reproduction:
producing offspring asexually or sexually
surface: area
heat production vs heat loss
the amount of hear that a cell produces depends on its volume. a cell’s ability to lose heat is depended on its surface area. too much volume-> cell overheats
surface: area
waste production vs excretion of waster
waste production depends on volume, waster excretion depends on surface area. too much volume, too much waster produced-> not enough surface area to excrete waste.
surface:area
resource consumption vs absorption
resource consumption depends on volume, absorption depends on surface area. too much volume-> too much consumption -> not enough surface area -> not enough absorption.
