Exam 8: Transport Across Membranes: Overcoming the Permeability Barrier

Assuming no change in either the internal or external calcium ion concentration,at what membrane potential would there be no net movement of calcium across the membrane?

The chloride-bicarbonate antiport is thought to function by which of the following mechanisms?

Based on the same graph,substances B and C

Which type of ATPase is associated with the integral binding of ATP as part of the transport process?

A special class of ABC-type ATPases associated with tumors that allow movement of antibiotics and other drugs out of the cell are known as

How would known cancer cells that possess multidrug resistance transport proteins affect cancer treatment? How might you potentially counter the effect of such transporters?

Cystic fibrosis is the result of a malfunction of the cell in transporting which of the following ions?

What would be the net ∆G′ for the coupling of these two reactions?

One mechanism by which ions are specifically transported into the cell is the

Which of the following is not a characteristic of passive transport?

You are wanting to modify plant cells.With the procedure you are using,the plant cells must be in a plasmolyzed state.This means that the plant cells must be placed in a(n)

The primary difference between active transport and facilitated diffusion is that active transport is the only one in which

The movement of water through a membrane,from an area of high concentration to an area of low concentration,is known as

Uptake of food particles by trapping them within an invagination of the plasma membrane is called ________.

The type of transport ATPase found in bacteria,mitochondria,and chloroplasts are the ________ ATPases.

What are the two most important properties that allow a molecule to cross a phospholipid bilayer by simple diffusion? What are two such molecules?

Animal cells use exocytosis to secrete all of the following except

Facilitated diffusion implies that energy in which form is NOT required?

The transport of two molecules across the cell membrane in different directions is called ________.