Shared Flashcard Set

Details

cell organelles and transport
for final
40
Biology
11th Grade
02/16/2009

Additional Biology Flashcards

 


 

Cards

Term
endomembrane system: food vacuole
Definition
transport food
Term
endomembrane system: giant vacuole
Definition
plants only, deals with water, storage
Term
nuclear envelope
Definition
protects the nucleus
Term
nucleolus
Definition
makes sure everything is running
Term
cell energy
Definition
mitochondria (animal): creates energy through cell respiration through ATP (break down of glucose).

chloroplast (plants only): photosynthesis
Term
cytoskeleton
Definition
structural: includes microfiliment, intermediate filament, microtubule.

work together to form cilia and flagella
Term
movement
Definition
cilia = hair.

flagella = tail
Term
plant v. animal
Definition
plant: cell wall, giant vacuole, chloroplast.

animal: centrioles, flagellum, lysosomes
Term
active transport
Definition
example: sodium potassium pump, lungs.

movement of molecules with energy.

low concentration to high (pump)

STEPS: solute binding, phosphorylation, transport, protein reversion
Term
tonicity: isotonic
Definition
solute = cell concentration.

results in dynamic equilibrium -> cell stays the same but molecules are still moving in and out of cell
Term
phospholipid bilayer
Definition
phosphate group replaces 1 of the fatty acid chains in a triglyceride (not E shape): creates polarity and is attracted to water.

polar head: hydrophilic (likes water).

non-polar tails: hydrophobic (fears water) - can't dissolve in water
Term
passive transport
Definition
examples: diffusion/osmosis.

movement of molecules without energy
Term
diffusion
Definition
movement of molecules from high concentration to low concentration until it reaches dynamic equilibrium (moving back and forth at same rate)
Term
osmosis
Definition
diffusion of water
Term
facilitated diffusion
Definition
diffusion across the membrane with the help of a transport protein. Ex: channel protein and carrier
Term
transport proteins: carrier
Definition
molecule specific.
molecule causes it to change shape to let it in. if wrong protein, it won't change shape
Term
transport proteins: simple channel
Definition
provides an opening in cell membrane.

not molecule specific.

is size specific
Term
transport proteins: pump
Definition
require energy. essentially the same (look and function)
Term
endocytosis
Definition
proteins from outside go inside
Term
exocytosis
Definition
proteins going outside
Term
3 main components of the cell membrane
Definition
phospholipid bilayer: main component, creates barrier for membrane, distinguishes outside and inside.

cholesterol: modified lipid (steriod), provides fluidity, too much = rigid like. they are spread out...

surface proteins: transport- channel, carrier, pump. signal proteins- glycoproteins
Term
tonicity: hypertonic
Definition
too much solute, more solute than cell concentration, results in plasmolysis- cell shrinks
Term
tonicity: hypotonic
Definition
too little solute. less solute than cell concentration. results in cytolysis: cell bursts - too full/too much water, with animal cells
Term
phospholipid bilayer
Definition
hydrophilic heads go towards water, hydrophobic tails sealed away from H2O = tails are dry.

H2O, O2, and CO2 can pass through barrier without help.

water is inside and outside of cell.

needs 2 layers.

hemogloban keeps oxygen in cells.
Term
cell characteristics
Definition
1. GROWTH AND DEVELOPEMENT - SPECIFIC PATTERNS
2. ENERGY UTILIZATION (METABOLISM) - TRANSFORM ENERGY FORM DIFFERENT USES
3. REPRODUCTION - PRODUCE THEIR OWN KIND
4. order - complex organization and differentiation of cells in the body
5. regulation - mechanisms maintain homeostasis
6. evolution - ability to change over time
Term
cell theory
Definition
1. cell are the basic unit of life
2. all living things are made up of cells
3. all cells come from other cells
Term
cell size
Definition
biggest = nerve and egg cells (visible by naked eye).

light microscope = plant/animal cells, nucleus, bacteria, mitochondrion.

electron microscope - viruses, ribosomes, proteins, lipids, small molecules, atoms
Term
what limits cell size?
Definition
surface area: body volume.


same volume can have different surface areas
Term
prokaryote
Definition
no nucleus: DNA found in nucleoid - circular DNA.

no membrane bound organelles.

smaller than 1-10 micro meters.

earlier in evolution.

cell wall, cell membrane, cytoplasm, ribosomes, cilia.

all unicellular.

examples: bacteria, archae
Term
eukaryote
Definition
nucleus: DNA is in the nucleus (stranded DNA).

membrane bound organelles: mitochondria, chloroplast, golgi body, lysosomes, ER.

larger (10-100 micro meters).

plants and fungi have a cell wall.

all other things are similar in eukaryotes.

uni and multicellular.

examples: animals, plants, fungi, and protist
Term
common characteristics between plants and animals
Definition
cell membrane, cytoplasm, ribosomes, clilia
Term
the brain: nucleus
Definition
nuclear envelope.
chromatin/chromosomes = DNA = genetic make-up, DNA and histones = nucleosomes
Term
the brain: nucleolus
Definition
produces RNA (ribosomes)
Term
endomembrane system: rough ER
Definition
transport proteins throughout cell.

has ribosomes (produce proteins) which then will enter the RER and then send it to the golgi body
Term
endomembrane system: smooth ER
Definition
transports lipids
Term
endomembrane system: golgi body/apparatus
Definition
decides where it needs to go
Term
endomembrane system: chromatin
Definition
contains the DNA
Term
endomembrane system: lysosome
Definition
digestion
Term
endomembrane system: transport vesicle
Definition
transport materials to golgi body
Supporting users have an ad free experience!