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The Cell Chapter 3
Term | Definition |
---|---|
Smallest Unit of Life | cell (helps to maintain homeostasis) |
Cell functions | metabolism transportation communication reproduction |
plasma Membrane | separates cell from everything from outside the cell Interacts with other cells |
Phospholipid Bilayer | governs interactions with other cells controls passage of material in and out of the cell |
Cholesterol is important for... | maintaining cell structure |
ECF | extracellular fluid |
ICF | intracellular fluid |
What does NOT use the protein door and uses the phospholipid bilayer instead? | small fats non charged particles |
What goes through protein channels? | water ions large fat soluble material |
Integral Proteins | protein channels |
Peripheral proteins | sit on top of cell marker bilayer to help identify |
Ligand Gate | responds to chemicals and only opens to certain chemicals/ions |
Voltage | opens to electrical impulses (things that have a charge) |
cytoplasm | liquid portion of the cell stores materials chemical reactions occur here |
organelles | specializes and structures compartmentalizes inside the cell |
cytoskeleton | helps maintain shape and function |
mitochondria | powerhouse of the cell makes ATP |
peroxisomes | breaks down fatty acids makes phospholipids for cell that makes the membrane of all cells in the nervous system |
ribosome | makes proteins |
rough endoplasmic reticulum | finishes folding proteins |
smooth endoplasmic reticulum | detoxifies drugs does not have ribosomes stores calcium makes lipids |
Golgi apparatus | "UPS" store packages proteins and send them off |
lysosomes | "garbage truck" eats dead cells, organelles, proteins very acidic makes enzyme hydrolase |
cytoskeleton | gives shape and structure of the cells offers support gives organelles something to anchor to allows cell to move |
actin filament | thinnest offers support and stretch |
intermediate filament | medium long and twisted can withstand tension |
microtubules | extend from centrosome pair of centrioles critical for cellular division |
microvilli | made of actin finger like projection increases surface area found in the intestinal tract |
cilia | hairlike moves in coordinated movement |
flagella | extension of cell allows for whip like movement only found in sperm |
nucleus | directs cell activities and contains DNA |
chromatin | long DNA molecule |
sister chromatids | identical copies of each chromosome |
selectively permeable | only certain things can go through (phospholipid bilayer) |
passive transport | requires no energy |
active transport | requires energy solutes move against concentration gradient |
3 ways on determining how a substance is able to move across the plasma membrane by passive or active transport | type of substance plasma membrane permeable to membrane concentration of substance in cytosol and ECF |
diffusion | movement of solute from high to low until equilibrium is reached |
single diffusion | cross membrane with no protein channel |
facilitated diffusion | cross membrane using protein channel |
osmosis | water moves from low to high concentration gradients |
isotonic | ECF and cytosol have same concentration of solute |
hypertonic | solute concentration in ECF is higher than inside the cell |
hypotonic | solute concentration of ECF is lower that inside the cell |
sodium-potassium pump | most vital for maintenance of sodium and potassium concentration gradient homeostasis |
vesicles | membrane packaging for protein |
endocytosis | receive/bring into cell |
pinocytosis | take in liquid |
phagocytosis | take in solid |
exocytosis | send protein out of the cell |
solute | what moves across membrane |
solvent | what cells are moving to and being dissolved |
concentration gradient | how much solute is on both sides of the cell |