Bio: Cells Flashcards
what is the function of the Plasma Membrane (or cell membrane
- Regulate that enters
2. Semipermeable membrane
what can enter the plasma Membrane
small, hydrophobic molecules
ie. CO2 , O2
small uncharged polar molecules
ie .H2O
What can not enter the cell Membrane
Large Polar Molecules
ie: Amino Acids , Glucose, Nucleotides
What kind of model is the cell Membrane
Fluid Mosaic Model
What does Fluid Mosaic Model mean?
Constantly moving arrangement of proteins
Where is Cytoplasm
Between cell membrane and the nuclear membrane
What does the Cytoplasm contain?
the Organelles
What takes place in the Cytoplams
Reactions
Where are Free Ribosommes
Free floating in cytoplasm
What do Ribosome’s carry?
Proteins
Where are attached Ribosommes
on the Rough Enduplasm reticulm
Nucleus?
Control center of the cell
What does the Nucleolus make?
Ribosommes
Nuclear pore
How substances leave the nucleus
Nuclear Membrane
surrounds the nucleus
Prokaryotic cells are…
Simple cells
Properties of Prokaryotic cells are
small,simple,unicellular,spheres,rods,spirals,DOESN’T HAVE A MEMBRANE BOUND NUCLEUS,flagella (used for movement)
Eukaryotic cells are….
Complex and Larger than prokaryotic.
Properties of Eukaryotic cells?
Large,membrane bound organelles,multicellular (they can be uni but mostly multi, ie. Yeast)
Viruses are….
Nonliving and replicate in cells
what three scientist contributed to the cell theory
Schwann, Schleiden and Virchow
Chromatic
Makes DNA and condenses to chromozones
Mitochondrion
Power house of the cell and makes ATP energy
What does ATP energy stand for?
adenosine Tripohsphate
whats in adenosine?
adenine and Ribose
Whats in Triphosphate
just 3 phosphate groups
When a phosphate has a broken bond, what does it become?
ADP
Golgi
Modifies, packages and secretes substances
Centriole
organize cell division (they look like twizlers
Microtubule
- moves chromosomes during cell division
- Together w/ Microfilament make up the cytoskeleton
Vacuole
Storage (Small + few in animal cell yet Large in plant cells)
-Holds water and Nutrients
Lysosomes
Cell Digestion
-break down material such as bacteria and dying organelles
Microfiliment
part of cytoskeleton
what 2 things make up the cytoskeleton?
Microtubule and Microfiliment
Ribosommes
Make protein
Endoplasmic Rehiculum (ER)
- Transport substances
- highway of the cell
Rough ER
RER
-has ribosomes
Smooth ER
no ribosomes but instead Lipids
Cell wall
- made of Cellulose for plants
- made of Chitin for fungi
- Structure and rigidity
Plastids
Only found in plant cells
-storage of chemical
Chloroplast
Site of photosynthesis
1st to use the word cell?
Robert Hooke:
1st to look at organisms under the microscopes
Anton Von Leewehnhoek
All animals are made of cells
Schwann
All plats are made of cells
Schleiden
All cells come from preexisting cells
Virchow
Cell membrane is a physical structure
Plowe
Nucleus is a dense region in the cell
Brown
Organelles all have specific functions
Margolis
Chloroplast
enclosed by double membrane; all reaction of photosynthesis occur in chloroplast
Golgi
Modifies, packages and scretes substanaces (post office)
