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1. all things are composed of one or more cells
2. cells are the basic unit of structure and function
3. new cells all come from exsisting cells |
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| .... came up with the idea that plants are made up of cells |
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| .... came up with the idea that all animals are made up of cells |
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| Virchow came up with the idea that |
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| new cells could only be produced from exsisting cells |
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| all cells except _____ and _______ are microscopic |
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| the greater the volume of a cell; |
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| the more difficult it is to receive oxygen and nutrients |
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| a cell with no nuclear membrane |
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| bacteria is a ______ cell |
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| these cells only have one chromosome |
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| these cells have a nuclear membrane |
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| these cells are membrane bound organelles |
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| what are the common features between prokaryotic and eukaryotic cells? |
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| both are bound by plasma membrane, cytosol, chromosome and ribosomes |
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| animals cells contain these things that plant cells do not |
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1. lysomes
2.centrioles
3.flagella |
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| plant cells contain these things that animal cells do not |
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1.chloroplasts
2.central vacuole and tonoplasts
3.cell wall
4.plasmodesmata |
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| what part of the cell regulates what enters abd leaves the cell? |
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| the cellular plasm membrane |
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| is the plasm membrane thick or thin? |
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| true or false: the plasma membrane is bilaminar. |
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| the DNA is located in the ____ of the cell |
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| chromosomes are made up of |
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| granular material usually spread throughout the nucleus except during cell division |
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| these serve as sites of protein synthesis in the cytoplasm |
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| these two membranous organelles are membrane bound, fluid containing sacs |
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| a system of membranous passageways |
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| separates cytoplasm into areas for transportation(membranes make passageways) |
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| which type of endoplasmic reticulum has ribosomes? |
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| makes porteins for secretion and phospholipids in membrane |
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| stack of flattened membranous sacs called cisternae |
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| _______is wedged between phospholipid molecules in animal cells |
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| cells change the _____ component of their membranes to compensate for changes in fluidity caused by changes in temperature |
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| to work properly with active enzymes, membranes need to be about as fluid as |
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| Singer and Nicholson created this in 1972 |
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| ________ membrane proteins are embedded in the phospholipid bilayer |
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| amphipathic phospholipid bilayer and embedded proteins are |
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| is diffusion passive or active transport? |
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| process by which molecules of a substance move from areas of higher concentration to areas of lower concentration, tendency of molecules of a substance to spread out in the availiable space |
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| is diffusion more rapid in gas or solids? |
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| diffusion arises from ________ movements |
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| occurs when the concentration of the solute is the same throughout a system. movement still continues afterward |
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| diffsion of water across a selectively permiable membrane |
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| solution has a higher solute concentration than the cell. water rushes out of the cell and it shrinks |
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| solution has a lower solute concentration than the cell. water rushes into the cell and it bursts |
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| equal solute concentrations, same on both sides |
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| internal osmotic pressure in plant cells; gives plant firmness or rigidity. survival depends on balancing water uptake and loss. |
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| loss of water in the cells due to osmosis; if plant is put into a hypertonic solution, it loses it's water to it's surroundings, shrivels and shrinks. plasm membrane pulls away from the wall; cell wall gives no advantage here |
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| if plant cell is isotonic to it's surroundings no movement of water into cell, so cell becomes flaccid plant may wilt. |
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