Lab 3: Cells

Question 1

Cell membrane

Answer 1

Forms the boundary that separates the living cell from the external environment, it is known as a selectively permeable or semi permeable membrane

Question 2

Diffusion is generally defined as

Answer 2

The movement of molecules from a region of high concentration to a region of low concentration until the state of equilibrium is reached

Question 3

Osmosis is generally defined as

Answer 3

The movement of molecules through a semi permeable membrane from a region of high concentration to region of lower concentration until the state of the equilibrium is reached

Question 4

An example of diffusion is

Answer 4

If tablesaw is dissolved in water, the salt associates in science dispersed throughout the water molecule until the uniform solution results

Question 5

With diffusion what factors affect the process

Answer 5

The temperature, the colder equals the slower diffusion, the hotter equals the faster diffusion

Question 6

Increasing temperatures

Answer 6

Increase his molecular activity, increase his collision of molecules in water

Question 7

When starch fines iodine molecules it produces a

Answer 7

Dark blue colour

Question 8

Iodine is a _______ in organic ________

Answer 8

Small, molecule

Question 9

Depending on the concentration of water given to you in a question what will this determine

Answer 9

If you’re object in the experiment will be over filled with water or being diminished of water

Question 10

Tonicity

Answer 10

Is a measure of the solutions ability to change the shape of cells by affecting the cells internal water volume

Question 11

Isotonic

Answer 11

Two solutions that have the same concentration of dissolved particles and water molecules

Question 12

A cell placed in isotonic solution will

Answer 12

Maintain its normal shape and volume

Question 13

Hypotonic

Answer 13

A solution that contains a lesser concentration of dissolve particles in a greater concentration of water molecules

Question 14

Hypertonic

Answer 14

A solution that contains a greater concentration of dissolved particles in a lesser concentration of water molecules than the cell

Question 15

In red blood cells if the cell shrinks and loses its characteristics shape this is called

Answer 15

Crenation

Question 16

Hemolysis

Answer 16

In red blood cells this is when the cell membrane ruptures in the contents of the red blood cell are released leaving only fragments of the cell behind

Question 17

When you heat up a solution the_______ has been disrupted this is called ________

Answer 17

Protein, denaturing

Question 18

And a living cell if you put it in acetone it

Answer 18

Gets disrupted and the phospholipids are dissolved

Question 19

The living cell membrane is called a _______ because it is composed of a double layer of_______ molecules with protein molecules immersed or floating throughout the lipid portion.

Answer 19

Phospholipid by layer, protein

Question 20

Do you know if the cell membrane is broken if

Answer 20

The contents come out a.k.a. the colour

Question 21

If there is no change in an experiment where you’re trying to determine if something is permeable to your bag what would this mean?

Answer 21

That a bag is permeable to both solutions

Question 22

Biuret solutions are for

Answer 22

Proteins

Question 23

Benedick solution is searching for

Answer 23

Glucose or monosaccharides