cells Flashcards
cell discovery people
Robert Hooke
Anton van Leeuwenhoek
(1665)
named cells from looking at once living organisms (cork)
Robert Hooke
1673
1st person to observe living cells
made microscopes
Anton van Leeuwenhoek
cell theory people
Schleiden, Schwann, and Virchow
cell theory
- all living organisms are made up of one or more cells
- cells are the basic units of structure and function in an organism
- cells come only from the reproduction of existing cells
cell function
structure dictates function
which is first: prokaryote or eukaryote?
prokaryote
- smaller
- have no membrane around organelle (such as nucleus)
- fewer organelles
- lack a nucleolus
- usually has one circular chromosome containing DNA
- reproduce by the process of binary fission
prokaryote
example of prokaryote
bacteria
- are bigger
- have membranes around their organelles
- contains a nucleolus
- have more chromosomes
- have more organelles
- reproduce by the process of mitosis or meiosis
eukaryote
examples of eukaryote
animal or plant cells
prokaryote: outermost layer
cell wall
prokaryote: just within the cell wall
cell membrane
prokaryote: along the surface; help the bacteria stick to surfaces
pilus
prokaryote: to move around; two large structures
flagella
prokaryote: watery interior of the cell; texture of jello
cytoplasm
prokaryote: sprinkled throughout the cell; small roundish structures; make proteins
ribosomes
circular structure within cytoplasm
DNA
trachea cells
redirect unwanted particles
adipose (fat) cell
-storage for extra material (energy)
bone cells
-sturdy, support heavy tissue
muscle cells
-expand and contract
nerve cells
-reach out to other cells to give information
connective tissue cells
-join different types of tissue
white blood cell
-grab various materials and surround them
plant, animal, or both:
endoplasmic reticulum
both
plant, animal, or both: nuclear envelope (nuclear membrane)
both
plant, animal, or both:
lysosomes
animal
plant, animal, or both:
chloroplasts
plants
plant, animal, or both:
cell wall
plants
plant, animal, or both:
vacuole
both
plant, animal, or both:
golgi apparatus
both
plant, animal, or both:
centrioles
animal
plant, animal, or both:
cytoplasm
both
plant, animal, or both:
nucleus
both
plant, animal, or both:
mitochondria
both
plant, animal, or both:
cell membrane
both
prokaryote
- oldest
- simplest of all the cells
vacuole
in which type of cell is bigger and what’s its purpose?
plant cell
-holds structure (turgor pressure) and food and water
control center of the cell
-stores the heredity information in DNA
nucleus
- gathers simple molecules to make more complex molecules
- takes complex molecules and packages them in vesicles and either stores them or sends them out
Golgi apparatus
-converts energy from sunlight into cheical energy for the cell
chloroplasts
semipermeable- allows certain things in and or out
cell membrane
–contain digestive enzymes that break up molecules, old organelles, and foreign substances
lysosomes
- -region of the cell between the nucleus and cell membrane
- gello-like and clear
cytoplasm
- smooth: makes and transports lipids (fat)
- rough: prepares proteins for export
endoplasmic reticulum
-allows certain things in and or out of the nucleus
nuclear envelope
-direct the organelles that are involved with cell division where to go
centrioles
- protects the cell
- provides structure and support
cell wall
-stores enzymes, metabolic, waste, and water
vacuole
-transforms energy from organic compounds into ATP (chemical form of energy that the cell can use)
mitochondria