29. What is the action of the Na/K pump? A. It is bidirectional for both ions B. It actively transports K+ out and Na+ into the cell C. It actively transports Na+ out and K+ into the cell D. It co-transports Na+ and K+ into the cell 30. Which of the following statement about plasma membranes is correct? A. The plasma membrane is impermeable to all molecules B. There is an asymmetrical distribution of phospholipids and glycolipids C. The phospholipid bilayer is entirely hydrophobic D. The plasma membrane is impermeable to water

29. What is the action of the Na/K pump? A. It is bidirectional for both ions B. It actively transports K+ out and Na+ into the cell C. It actively transports Na+ out and K+ into the cell D. It co-transports Na+ and K+ into the cell 30. Which of the following statement about plasma membranes is correct? A. The plasma membrane is impermeable to all molecules B. There is an asymmetrical distribution of phospholipids and glycolipids C. The phospholipid bilayer is entirely hydrophobic D. The plasma membrane is impermeable to water

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 4TYK: A characteristic of carrier molecules in a primary active transport pump is that: a. they cannot...

See similar textbooks

Similar questions

Describe the contribution of each of the following to establishing and maintaining membrane potential: (a) the Na+K+ pump, (b) passive movement of K+ across the membrane, (c) passive movement of Na+ across the membrane, and (d) the large intracellular anions.
A characteristic of carrier molecules in a primary active transport pump is that: a. they cannot transport a substance and also hydrolyze ATP. b. they retain their same shape as they perform different roles. c. their primary role is to move negatively charged ions across membrances. d. they move Na+ into a neural cell and K+ out of the same cell. e. they act to establish an electrochemical gradient.
Which of the following methods of transport is being used to transfer the substance into the cell in the accompanying graph? a. diffusion down a concentration gradient b. osmosis c. facilitated diffusion d. active transport e. vesicular transport f. It is impossible to tell with the information provided.
The Na/K pump in epithelium cells that line the gut is an example of ______ transport and helps __ Select one: a. active, prevent the movement of Cl- outside the cell b. active, prevent the movement of Cl- inside the cell c. active, prevent the movement of Na+ outside the cell d. passive, prevent the movement of Cl- outside the cell e. passive, prevent the movement of Cl- inside the cell
Which of the following statements about "leak channels" in the plasma mem- brane is correct? A. Proteins that form these channels bind to solutes to allow them to pass into the cell. B. They are passageways formed by proteins to allow water and ions to move passively through the membrane. C. They allow small ions and molecules to move between adjacent cells. D. They are formed by glycoprotein and proteoglycans to allow hormones to enter cells.
In which way are voltage-gated ion channels and active transporters similar? a they are required to move small permeable molecules across cell membranes b they are proteins which move molecules across cell membranes c they utilize facilitated diffusion d they directly require energy in the form of ATP to move molecules e they generate concentration gradients
The sodium–potassium pumpa. helps establish an electrochemical gradient across the membrane.b. concentrates sodium on the outside of the membrane.c. uses a carrier protein and chemical energy.d. is present in the plasma membrane.e. All of these are correct.
one reason active transport has a limited maximum transport rate at which it can progress is due to the fact that a. energy required is not available inside the cell b. carrier proteins are not on the surface of the cell membrane c. ion channels are limited in size d. the number of carrier proteins is limited and therefore they can become saturated
secondary active transport depends on which of the following principals a. sodium is pumped pout of the cells against a concentration gradient by [primary active transport b. sodium moves out the cells with a concentration gradient c. primary active transport is necessary to pump sodium into the cell from higher to lower concentration d. diffusion causes sodium to move our of the cell
The resting membrane potential of a cell is the consequence of which of the following concentrations of ions? A. High K* and Cl- outside the cell and high Na* and large anions inside the cell. B. High K* and Na* outside the cell and high Cl- and large anions inside the cell. C. High Cl- and Nat outside the cell and high K* and large cations inside the cell. D. High Ca2+ and Nat outside the cell and high K* and large cations inside the cell.
The major function of the sodium-potassium pump is toa. pump Na+ into and K+ out of the cell.b. generate the resting membrane potential.c. maintain the concentration gradients of Na+ and K+ across theplasma membrane.d. oppose any tendency of the cell to undergo hyperpolarization.
Calcium ions (Ca?+) are a typical cell at rest. a. more concentrated in the cytosol of b. equally distributed across the membrane of c. more concentrated in the extracellular fluid of