WorksheetsProteins on Strike! Transport across plasma membrane
Total questions: 15
Worksheet time: 5mins
A function of the plasma membrane is...
A selectively permeable membrane
Attacks other cells
Eats other cells
Does not have a function
What is the meaning behind the PHOSPHOLIPIDS’ chant?
the selectively permeable nature of the plasma membrane
the impermeable nature of the plasma membrane
the permeable nature of the plasma membrane
they want to go to the party
What are aquaporins?
Transmembrane proteins that carry H2O molecules
Peripheral proteins that control water balance
H2O carrier proteins (active transport)
Red blood cell glycocalyx
How are they involved in plasma membrane transport?
Regulate the water balance by osmosis.
None.
They increase the tonicity.
Alter the water balance by passive diffusion.
Why is the water concerned about aquaporins do not work?
It is not compatible with survival of the cell.
Because they are the only mb proteins in the cell.
Because it is the only way to expel water.
Because there is a lot of ATP consumption.
In addition to the use of aquaporins, what is another way H2O can cross the plasma membrane?
Passive diffusion.
Endocytosis.
Facilitate diffusion.
Exocytosis.
GLU & AAs claim to have a special relationship with their respective transport proteins. Why?
Facilitated diffus. Carrier protein. Specific binding sites.
Pasive diffusion. Carrier protein.
Pasive diffussion. Channel protein. Specific binding sites.
Facilitated diffusion. Channel protein.
Could O2 and CO2 make the same claim as GLUCOSE and AMINO ACID? Why?
No. They do not need carrier proteins.
Yes. They have transporter proteins. Specific binding sites.
No. They have channels proteins.
More or less. They have channels proteins.
PHIL LIPID and PROFESSOR TOSOL discuss the Great Dehydration. What did happen inside the cell?
↓H2O & ↑Na+ inside the cell
↑H2O & ↑Na+ outside the cell
↓H2O & ↓Na+ outside the cell
↑H2O & ↓Na+ inside the cell
What is the sodium-potassium pump?
Ion exchange. Active transport (requires ATP)
Ion exchange. Passive transport (requires ATP)
Ion channel. Passive transport (no requires ATP)
Ion channel. Active transport (no requires ATP)
Passive membrane transport processes include...
Movement of a substance down its concentration gradient
Movement of water from area of low to high concentration
Use of transport protein from areas of low to high concen.
ATP consumption
Transcytosis
Na+ passes through the plasma membrane exclusively by the Na+ / K+ pump
True
False
Receptor-mediated endocytosis (pynocytosis)
What would happen to The Cell if the transport proteins went on strike?
It would die.
It would work slower.
It would wait for the works council.
Nothing.
