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Flashcards in Chapter 5/6 Deck (52)
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Process by which substances from an area of high concentration to an area of low concentration

Diffusion

1

Where does diffusion occur

Across membranes

2

The ability of a molecule to go though a membrane depends on..(3)

-size
-type(polar,nonpolar)
-molecule structure of the embrace

3

There is no net movement when there is

Equilibrium

4

Equilibrium is when

It is the same percentage of everything in and out of the cell

5

Concentration gradient

Difference in concentration of the substances

6

What is concentration gradient separated by

A membrane

7

The movement of water from an area of high concentration to lower concentration

Osmosis

8

What type of molecules does osmosis occur with

Water

9

Hypotonic
Outside cell-
Inside cell-
Effect on cell-

Low solute, high solvent
High solvent, low solute
Cell swells

10

Hypertonic
Outside cell-
Inside cell-
Effect on cell-

High solute, low solvent
Low solute, high solvent
Cell shrinks

11

Isotonic
Outside cell-
Inside cell-
Effect on cell-

Same
Same
Same

12

Specialized structures that remove excess water

Contractile vacuoles

13

When the animal swells or burst

Cytolysis

14

What does the cell wall do during osmosis

Become rigid due to turgor pressure, holds cell membrane

15

Function of cell membrane in osmosis

If it shrinks and detached from the cell wall, the cell will die; when filled with water, turgor pressure will develop

16

Plant cells need turgor pressure because

Without it the cell will shrink and die

17

Plasmolysis

When a plant cell shrinks then dies

18

Transport proteins that aloe ions to pass through the cell membrane

Ion channels

19

Ion channels are either

Open or closed

20

Closed ion channel will respond to

Different stimuli to allow things pass through them

21

Facilitated diffusion uses

Carrier proteins

22

Carrie proteins are

Specific to what they will let transport across the cell membrane

23

Facilitated diffusion is

Passive

24

Facilitated diffusion speeds up

Diffusion

25

Passive transport is

Transport that does not require energy

26

Movement of any substance across a cell membrane that does require energy

Active transport

27

Movement of sodium and potassium against concentration gradient

Sodium potassium pump

28

Sodium potassium pump uses ___ as an energy source

ATP

29

Sodium potassium pump is important for 3 vital functions

Muscle contractions
Nerve impulses
Kidney function