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Biology Lab Exam #1 > Osmosis And Diffusion > Flashcards

Flashcards in Osmosis And Diffusion Deck (22)
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1

Selectively permeable

Only allow certain molecules across

2

Active transport

Requires energy

3

Passive transport

NO energy required; occurs only if the membrane is permeable to the substance

4

diffusion

The movement of molecules from areas of high concentration to areas of low concentration

5

Osmosis

Process where water moves across a membrane from high water content (low solute) to low water content (high solute)

6

Isotonic

Normal; equal amounts of the substance (molecules) are found on each side of the membrane

7

Hypertonic

Cell shrinks; The solution on one side of the membrane contains a greater concentration of molecules compared to the other.


8

HypOtonic

Cells swell; The solution one side of the membrane contains a lower concentration of molecules compared to the other

9

Hemolysis( hypOtonic solution)

"Burst"; The rupture or destruction of red blood cells ( Occurs in animal cells)

10

Crenation (hypertonic solution)

Shrinking of the cell (occurs in animal cells)

11

If starch is present in a solution what color will it turn?

Black

12

What is an indicator for starch?

Iodine

13

Plasmolysis (hypertonic solution)

Plants are placed in a solution containing a high concentration of salt, the water molecules leave the cells , causing them to shrink

14

Turgor pressure (hypotonic solution)

The pressure of water pushing the plasma membrane against the cell wall of a plant

15

Osmotic pressure

The movement of water across a semi permeable membrane

16

If the number of molecules on one side of the membrane contains a greater concentration compared to the other and they will move along a _________ until equal

Concentration gradient

17

A solution which contains a greater amount of solute outside the cell is?

Hypertonic

18

A solution which contains a lesser amount of solute outside the cell is?

HypOtonic

19

A plant cell placed in a hypertonic solution is?

Plasmolysis

20

An animal cell placed in a hypertonic solution is?

Crenation

21

A plant cell placed in distilled water is?

Turgor pressure

22

An animal cell placed in a hypOtonic solution is?

Hemolysis