Chapter 9 Quiz

The P-glycoprotein is an example of a(n) _____ which has been linked to drug resistance in the treatment of _____.

ABC transporter; cancer

During receptor- mediated endocytosis, the movement of the receptor- ligand complex requires the presence of

Coat proteins

After depolarization of a nerve cell, what event restores the resting potential?

K+ efflux

The Na,K-ATPase is a(n) _____ that moves Na+ from _____ and K+ from _____.

antiporter; inside to out; outside to in

What type of transporter is responsible for moving water across membranes?

aquaporin

What is a transporter that moves two different molecules or ions in the same direction?

symporter

True/False Pinocytosis is a specific type of exocytosis where small amounts of intracellular material are sequestered in a vesicle followed by membrane fusion and transport of the material to the outside of the cell.

False

Inside a nerve cell at rest, [Na+] is _____ and [K+] _____ relative to the concentrations seen outside the cell.

low: high

The movement of glucose into a cell when blood sugar is high is accomplished by _____. The movement of K+ against its concentration gradient is accomplished by _____.

passive transport; active transport

coat proteins functions by mediating

pinching off a portion of the membrane containing the receptor- ligand complex