Cell Membrane Transport / Feedback

Question 1

What is negative feedback?

Accepted Answer

When your body has a change that it tries to stop

Question 2

__________ is the diffusion of water through a semipermeable membrane.

Accepted Answer

osmosis

Question 3

Active transport

Accepted Answer

all of the answers are correct

Question 4

Which of these is selectively permeable?

Accepted Answer

all of these are selectively permeable

Question 5

How does your body maintain homeostasis when your temperature rises?

Accepted Answer

Blood vessels dilate and you sweat

Question 6

Requires energy; vesicle fuses with membrane, contents forced OUT of cell = ?

Accepted Answer

exocytosis

Question 7

What is a definition of "homeostasis?"

Accepted Answer

maintaining a stable internal environment int the body

Question 8

The PRIMARY function of the cell membrane is

Accepted Answer

to control what moves in and out of the cell.

Question 9

Another name for the cell membrane is:

Accepted Answer

the plasma membrane

Question 10

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

Accepted Answer

hypertonic

Question 11

The basic structure of the cell membrane is

Accepted Answer

a phospholipid bilayer.

Question 12

What kind of solution is the red blood cell in the middle in?

Accepted Answer

isotonic

Question 13

Equilibrium is reached...

Accepted Answer

when particles are evenly distributed through the space.

Question 14

What structure plays an important role in maintaining homeostasis?

Accepted Answer

Cell Membrane

Question 15

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

Accepted Answer

diffusion

Question 16

What kind of transport DOESN'T require the use of energy to move materials across the membrane?

Accepted Answer

none of these require the cell to use energy

Question 17

What is an example of positive feedback?

Accepted Answer

Labor contractions

Question 18

What is this process called?

Accepted Answer

Negative feedback cycle

Question 19

In cells sodium ions are “pumped” from a lower to higher concentration. This process is called?

Accepted Answer

Active transport

Question 20

What is concentration?

Accepted Answer

amount of a substance in a given area

Question 21

What kind of solution is the red blood cell on the left in?

Accepted Answer

hypotonic

Question 22

What kind of solution is the red blood cell on the right in?

Accepted Answer

hypertonic

Question 23

Passive transport

Accepted Answer

moves particles from a high to a low concentration., doesn't require energy.

Question 24

What molecules are embedded in the phospholipid bilayer of the membrane?

Accepted Answer

proteins

Question 25

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

Accepted Answer

isotonic

Question 26

What is a real-world example of negative feedback?

Accepted Answer

sweating when hot

Question 27

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

Accepted Answer

hypotonic

Cell Membrane Transport / Feedback

Questions 27

Cell Membrane Transport / Feedback

Questions 27