Chapter 10 pre

Question 1

Carrier proteins can be involved in which of the following processes?

Answer 1

active transport
facilitated diffusion

Question 2

Which of the following describes movement down a concentration gradient that takes place directly over the plasma membrane, without the aid of a channel or carrier protein?

Answer 2

simple diffusion

Question 3

Which of the following processes involve movement down a concentration gradient (i.e., from an area of high concentration to an area of low concentration)?

Answer 3

simple diffusion
osmosis
facilitated diffusion

Question 4

Which of the following processes require a membrane protein and energy?

Answer 4

active transport

Question 5

What is another term for the diffusion of water?

Answer 5

osmosis

Question 6

Plasma membranes allow some substances to enter and leave a cell, but prevent other substances from crossing the membrane; plasma membranes are therefore ________________________.

Answer 6

selectively permeable

Question 7

A passive process of transport which requires no energy is called ________________.

Answer 7

diffusion

Question 8

Which of the following describes a solution that has a higher solute concentration than a cell’s cytoplasm?

Answer 8

hypertonic solution

Question 9

What is another term for a dissolved substance?

Answer 9

solute

Question 10

Which of the following uses the energy of diffusion of a substance to bring another substance into the cell against its concentration gradient?

Answer 10

Secondary active transport

Question 11

In the small intestine, glucose is moved against its concentration gradient into intestinal epithelial cells using sodium-glucose cotransporter proteins. The energy to move glucose against its gradient is supplied by the energy released by sodium ions diffusing down their gradient. This is an example of __________________________.

Answer 11

secondary active transport

Question 12

The process of moving substances out of cell by means of a vesicle is called ___________________.

Answer 12

exocytosis

Question 13

Which of the following processes involve vesicles that help transport substances across a membrane?

Answer 13

exocytosis
endocytosis

Question 14

If a cell is placed in an hypotonic solution, what will happen?

Answer 14

the cell will swell and possibly burst as water enters the cell

Question 15

If a cell is placed in an isotonic solution, what will happen?

Answer 15

water will move in and out of the cell, but there will be no net movement

Question 16

Which of the following processes involve movement up a concentration gradient (i.e., from an area of low concentration to an area of high concentration)?

Answer 16

active transport

Question 17

Which of the following processes require energy

Answer 17

bulk transport
active transport

Question 18

Which of the following describes a solution that has a lower solute concentration than a cell’s cytoplasm?

Answer 18

hypotonic solution

Question 19

A protein that binds a molecule on one side of the plasma membrane, changes shape, and moves the molecule to the other side of the membrane is called a(n) _____________________.

Answer 19

carrier protein

Question 20

In the small intestine, glucose is moved against its concentration gradient into intestinal epithelial cells using sodium-glucose cotransporter proteins. The energy to move glucose against its gradient is supplied by the energy released by sodium ions diffusing down their gradient. This is an example of

Answer 20

secondary active transport

Question 21

The process of bringing substances into a cell by means of a vesicle is called __________________.

Answer 21

endocytosis

Question 22

If a cell is placed in an hypertonic solution, what will happen?

Answer 22

the cell will shrivel as water leaves the cell

Question 23

When large particles are moved into the cell using a vesicle, this is called ______________.

Answer 23

endocytosis

Question 24

____________ active trasport is directly moving a substance across a membrane from an area of lower concentration to an area of higher contration.

Answer 24

Primary

Question 25

The sodium-potassium pump moves sodium ions out of the cell and potassium ions into the cell at the same time, using ATP. Each ion is moved against its gradient, from an area of lower concentration to an area of higher concentration. This is an example of ________________________.

Answer 25

primary active transport