Question 1

Opening a sodium channel during the resting membrane potential will cause the potential to become less ____________________.

Accepted Answer

The answer of Opening a sodium channel during the resting...

Question 2

In a plasma membrane, simple diffusion of various substances can occur

Accepted Answer

A) through channels 
B) through carriers 
C) between phospholipid molecules 
D) through aquaporins 
E) into the cell but not out of the cell

Question 3

The following questions refer to comparative concentrations, permeabilities, and potentials under various circumstances.Indicate the relationship between the two items listed in each situation using the following answer code.
a.A is greater than B
b.B is greater than A
c.A and B are equal
-a.permeability of a cell membrane to K⁺
B.permeability of a cell membrane to Na⁺

Accepted Answer

The answer of The following questions refer to comparative concentrations,...

Question 4

Gap junctions contain carrier proteins that transport ions from one cell into another cell.

Accepted Answer

A) True 
 B)False

Question 5

Collagen

Accepted Answer

A) provides tensile strength to the cytoskeleton 
B) is most abundant in tissues that stretch and then recoil 
C) forms the intercellular filaments of desmosomes 
D) is the most abundant protein in the ECM 
E) all of these

Question 6

The three characteristics that determine the kind and amount of material that can be moved across a membrane by carrier-mediated transport are ____________________, ____________________, and ____________________.

Accepted Answer

The answer of The three characteristics that determine the kind...

Question 7

Phosphorylation of a carrier can alter the affinity of its binding sites, accompanied by a change in its conformation.

Accepted Answer

A) True 
 B)False

Question 8

The plasma membrane

Accepted Answer

A) appears under an electron microscope as a double dark line with a light space between 
B) is composed primarily of a double layer of protein molecules with cholesterol molecules interspersed between them 
C) has a hydrophilic region between two hydrophobic regions 
D) has all of the above characteristics 
E) does not exhibit any of the above characteristics

Question 9

In ____________________ diffusion, water-soluble materials move through specific channels in the cell membrane.

Accepted Answer

The answer of In ____________________ diffusion, water-soluble materials move through...

Question 10

Indicate whether the force in question tends to move the involved ion into or out of the cell by filling in the blank using the following code.
a.tends to move the ion into the cell
b.tends to move out of the cell
-Na⁺-K⁺ pump for K⁺

Accepted Answer

The answer of Indicate whether the force in question tends...

Question 11

Ions can pass into or out of the cell only through ____________________ and ____________________ in the plasma membrane.

Accepted Answer

The answer of Ions can pass into or out of...

Question 12

A substance does not move down a concentration gradient through

Accepted Answer

A) a symporter 
B) an antiporter 
C) a primary active transporter 
D) a secondary active transporter 
E) facilitated diffusion carrier

Question 13

A solution containing ____________________ mOsm of solute is isotonic to human cells.

Accepted Answer

The answer of A solution containing ____________________ mOsm of solute...

Question 14

Carbon dioxide exits cells by simple diffusion between phospholipid molecules in the plasma membrane.

Accepted Answer

A) True 
 B)False

Question 15

All of the following transport certain substances from regions of high concentration to low concentration except

Accepted Answer

A) carriers 
B) facilitated diffusion 
C) SGLT 
D) GLUT 
E) Ca₂₊ pump

Question 16

Carriers that perform facilitated diffusion or secondary active transport of glucose do not split ATP.

Accepted Answer

A) True 
 B)False

Question 17

Use the figure above to answer the corresponding questions.
-Describe how an ATP is important to the SGLT carrier.

Accepted Answer

The answer of  
Use the figure above to answer...

Question 18

Glucose enters some cells

Accepted Answer

A) through primary active transport 
B) through secondary active transport 
C) through facilitated diffusion 
D) all of the above processes 
E) through A and C only

Question 19

The ____________________ equation equates the equilibrium potential for an ion with the ion's concentration difference outside and inside the cell.

Accepted Answer

The answer of The ____________________ equation equates the equilibrium potential...

Question 20

During the steady state, the concentration and electrical gradients for K⁺ are in opposition to each other and exactly balance each other so there is no net movement of K⁺.

Accepted Answer

A) True 
 B)False

Exam 3: The Plasma Membrane and Membrane Potential

Opening a sodium channel during the resting membrane potential will cause the potential to become less ____________________.

In a plasma membrane, simple diffusion of various substances can occur

Gap junctions contain carrier proteins that transport ions from one cell into another cell.

Collagen

The three characteristics that determine the kind and amount of material that can be moved across a membrane by carrier-mediated transport are , , and .

Phosphorylation of a carrier can alter the affinity of its binding sites, accompanied by a change in its conformation.

The plasma membrane

In ____________________ diffusion, water-soluble materials move through specific channels in the cell membrane.

Indicate whether the force in question tends to move the involved ion into or out of the cell by filling in the blank using the following code. a.tends to move the ion into the cell b.tends to move out of the cell -Na⁺-K⁺ pump for K⁺

Ions can pass into or out of the cell only through and in the plasma membrane.

A substance does not move down a concentration gradient through

A solution containing ____________________ mOsm of solute is isotonic to human cells.

Carbon dioxide exits cells by simple diffusion between phospholipid molecules in the plasma membrane.

All of the following transport certain substances from regions of high concentration to low concentration except

Carriers that perform facilitated diffusion or secondary active transport of glucose do not split ATP.

Use the figure above to answer the corresponding questions. -Describe how an ATP is important to the SGLT carrier.

Glucose enters some cells

The ____________________ equation equates the equilibrium potential for an ion with the ion's concentration difference outside and inside the cell.

During the steady state, the concentration and electrical gradients for K⁺ are in opposition to each other and exactly balance each other so there is no net movement of K⁺.