Proteins on Strike! Transport across plasma membrane

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)