Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
who was the cell theory developed by?
|
schleiden and schwann
|
|
|
what 3 things does it state?
|
1) all living things consist of cells
2) cells are the basic function and structure of things 3) all cells come from other cells- rudolph virchuw |
|
|
are eukaryotic cells or prokaryotic cells bigger in size??
|
eukaryotic cells
|
|
|
in a electron microscope the cells must be....
|
dead
|
|
|
what is the process of cell fractionation?
|
1) homogenate
2) low speed 3) supertanant denatures 4) high speed |
|
|
what is the function of the nucleus?
|
controlling center of the cell
|
|
|
what is the function of the nucleolus?
|
site of RNA synthesis and storage
|
|
|
what is the function of the mitochondria?
|
powerhouse of the cell
|
|
|
what is the function of the lysosomes?
|
digestive enzymes
|
|
|
what cell are plastids in...plant of animal?
|
plant only
|
|
|
what is the function of the centrioles?
|
helps the cell divide
|
|
|
what cell are peroxisomes in...plant or animal?
|
animal only
|
|
|
what did Overton determine?
|
that the membrane is composed of lipids
|
|
|
who determined the membrane contained two layers of amphipathic phospholipid molecules?
|
gorter and grendel
|
|
|
danielli and davson determined what?
|
the membrane is a phospholipid bilayer sandwhiched between 2 layers of globular protein
|
|
|
singer and nicolson determined what?
|
the fluid mosaic model
|
|
|
why is the membrane called the fluid mosaic model?
|
because proteins move smoothly through the membrane in a constantly changing pattern.
|
|
|
glycolipids and glycoproteins help do what with other cells?
|
they are signatures, help cells recognize other cells
|
|
|
passive transport is what?
from ---------- to ---------of concentration types of passive transport are? |
NO energy
greater to lesser diffusion, osmosis, and facilitated diffusion |
|
|
what is diffusion?
|
from greater to lesser concentration, movement is random and will continue until equalibruim is reached
No membrane is needed |
|
|
the diffusion of water across a selectively permeable membrane from greater to lesser concentration is what?
|
osmosis/ equilibrium might not be reached
|
|
|
facilitated diffusion?
|
diffusion of solutes across a selectively permeable membrane with the help of transport proteins (carrier molecules) in the membrane. NO energy required.
|
|
|
an energy requiring process with the breakdown of ATP?
for every 3 ------ 2 of ------- are pumped into. some examples of active transport are? |
active transport
soduim and potassium. electrochemical gradient, electrogenic pump, and cotransport. |
|
|
all cells have ------ across their plasma membranes?
|
voltages
|
|
|
a voltage is also called a?
|
membrane potential
|
|
|
electrochemical gradiant?
|
ions may not always move down their concentration gradient but they always move down their electrochemical gradient.
|
|
|
electrogenic pump is major in what cell?
and proton pump is major in what cell? |
animal
plant |
|
|
cotransport?
|
when a molecule tries to go across a membrane but cant, but then another molecule hooks up with the other one and then they can go in.
|
|
|
process of importing macromoleculs into a cell by forming vesicles derived from the cell membrane?
|
endocytosis
|
|
|
examples of endocytosis are?
|
phagocytosis, pinocytosis, and recceptor-mediated cytosis.
|
