Ch 1 Test Cell Structure and Formaiton (11/7/14) Test

Question 1

The cell membrane is______ _______, which means that some substances can pass through it while others cannot?

Answer 1

Selectively permeable

Question 2

Substances that can move into and out of the cell do so by what three methods?

Answer 2

1. diffusion
2. osmosis
3. active transport

Question 3

______ is the process by which molecules tend to move form an area of higher concentration to an area of lower concentration?

Answer 3

Diffusion

Question 4

The diffusion of water molecules through a selectively permeable membrane is called_____?

Answer 4

Osmosis

Question 5

How is osmosis related to diffusion?

Answer 5

Diffusion and osmosis are both forms of passive transport.

Question 6

The movement of materials through a cell membrane without using energy is called ________?

Answer 6

Passive transport

Question 7

_______ is the movement of material through a cell membrane using energy?

Answer 7

Active transport

Question 8

What is the difference between passive transport and active transport?

Answer 8

Active transport requires the cell to use energy while passive transport does not.

Question 9

What are two methods that materials are moved by active transport?

Answer 9

1. Transport proteins

2. Transport by Engulfing