- Shuffle
Toggle OnToggle Off
- Alphabetize
Toggle OnToggle Off
- Front First
Toggle OnToggle Off
- Both Sides
Toggle OnToggle Off
Front
How to study your flashcards.
Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key
Up/Down arrow keys: Flip the card between the front and back.down keyup key
H key: Show hint (3rd side).h key
PLAY BUTTON
PLAY BUTTON
25 Cards in this Set
- Front
- Back
|
open system
|
organism that interacts and is affected by its environment
|
|
light microscope (LM)
|
basic microscope, light goes through specimen then lens then eye
|
|
magnification
|
how much larger an organism appears compared to its actual size
|
|
resolving power
|
clarity of image
|
|
organelles
|
subcellular structures
|
|
electron microscope (EM)
|
electrons pass through specimen
|
|
transmission electron microscope (TEM)
|
uses electromagnet lenses; focused onto a screen for viewing; used mainly for internal ultrastructure of cells
|
|
scanning electron microscope (SEM)
|
used mainly for detailed study of the surface of a specimen; 3D appearance: electrons become excited; specimen usually coated in gold
|
|
cytology
|
the study of cell structure
|
|
What is the objective of cell fractionation?
|
to separate organelles so functions can be studied
|
|
ultracentrifuge
|
most powerful kind of centrifuge (used in cell fractionation)
|
|
homogenization
|
disruption of cells (first step in cell fractionation)
|
|
pellet
|
large structures packed at bottom of test tube after being spun in centrifuge at various intervals of time
|
|
supernatant
|
smaller cell parts suspended in liquid above pellet
|
|
What organisms are composed of prokaryotic cells? Eukaryotic?
|
prokaryotic: bacteria only
eukaryotic: all others |
|
A prokaryotic cell does not contain a _____.
|
nucleus
|
|
nucleoid
|
DNA is enclosed in this in prokaryotic cells (but there is no membrane between DNA and the rest of the cell).
|
|
A eukaryotic cell has a ________ __________ enclosed in a _________ ___________.
|
true nucleus enclosed in a membrane envelope
|
|
cytoplasm
|
region between nucleus and membrane
|
|
cytosol
|
makes up cytoplasm; semifluid in which organelles are suspended
|
|
What is the relation in size between eukaryotic and prokaryotic cells?
|
eukaryotic cells are 10 times larger (in general)
|
|
plasma membrane
|
selective barrier allowing oxygen, nutrients and wastes to pass into the cell in order to provide sufficient service to the cell
|
|
A cell's surface area must be _______ than it's volume.
|
larger
|
|
What do internal membranes do?
|
partition the cell into compartments
|
|
Biological membrane have a double layer of ______________. ___________ are embedded into membranes.
|
double layer of phospholipids
proteins are imbedded in membranes (enzymes too) |
