Cell Membranes & Cell Transport II

Question 1

The basic structure of the cell membrane is

Accepted Answer

a phospholipid bilayer.

Question 2

The primary function of the cell membrane is

Accepted Answer

to control what moves in and out of the cell.

Question 3

Requires energy; materials enter pockets in cell membrane, then forms vacuole in cytoplasm = ?

Accepted Answer

endocytosis

Question 4

Requires energy; vacuole fuses with membrane, contents forced out of cell = ?

Accepted Answer

exocytosis

Question 5

Passive transport

Accepted Answer

doesn't require energy.

Question 6

A cell is in a ____solution when: size doesn't change; water goes in and out at the same rate

Accepted Answer

isotonic

Question 7

Movement of particles from an area of high concentration to an area of lower concentration is:

Accepted Answer

diffusion

Question 8

Water enters, cell swells; lower solute concentration outside the cell than inside = __solution

Accepted Answer

hypotonic

Question 9

Equilibrium is reached

Accepted Answer

when particles are evenly distributed through the space.

Question 10

What is concentration?

Accepted Answer

amount of things in a given area

Question 11

Active transport

Accepted Answer

all of the answers are correct

Question 12

__________ is the diffusion of water through a semipermeable membrane.

Accepted Answer

osmosis

Question 13

What is structure "D"?

Accepted Answer

a protein

Question 14

Water leaves, cell shrinks; higher solute concentration outside cell than inside = ? solution

Accepted Answer

hypertonic

Question 15

"A" is

Accepted Answer

a hydrophilic phosphate "head"

Question 16

The stuff that is dissolved is the _________.

Accepted Answer

solute

Question 17

Another name for the cell membrane is

Accepted Answer

the plasma membrane

Question 18

The stuff that does the dissolving is the __________.

Accepted Answer

solvent

Question 19

What kind of transport doesn't require the use of energy to move materials across the membrane?

Accepted Answer

all of these don't require the cell to use energy

Questions 19