Transport Lab (4)

Question 1

Plasma Membrane

Answer 1

selectively controls what enters and exits the cell to maintain homeostasis

Question 2

Cell Membrane

Answer 2

the Fluid Mosaic Model (Phospholipid Bilayer)

Question 3

Fluid Mosaic Model

Answer 3

model that describes arrangement and movement of molecules that make up the cell membrane

Question 4

Peripheral Proteins

Answer 4

proteins of membrane that are not embedded in the lipid bilayer

loosely bound to the surface

Question 5

Integral Proteins

Answer 5

proteins that are permanently attached to the membrane

Question 6

How do integral proteins stay anchored?

Answer 6

amino acids on the top and bottom of the membrane and they have a lipophobic R group

Question 7

Transmembrane Protein

Answer 7

spans the entirety of the cell

Question 8

Passive Transport

Answer 8

does not need energy to move solute from a high concentration region to a low concentration region:
simple diffusion
facilitated diffusion
osmosis

Question 9

Active Transport

Answer 9

needs energy to move solute against concentration gradient:
transport pumps
endocytosis
exocytosis

Question 10

Simple Diffusion

Answer 10

movement of solute from a high concentration to a low concentration

Question 11

Facilitated Diffusion

Answer 11

use channel proteins to move molecules that cannot freely cross the cell membrane from a high concentration to a low concentration

Question 12

Osmosis

Answer 12

diffusion of solvent molecules through a selectively permeable membrane from a high water potential to a low water potential region

Question 13

Transport Pumps

Answer 13

they move ions or molecules against their concentration gradient

Question 14

Exocytosis

Answer 14

energy required process in which substances are released outside the cell

exit the cell

Question 15

Endocytosis

Answer 15

energy required process in which they intake substances into the cell

enter the cell

Question 16

Phagocytosis

Answer 16

process of endocytosis involving engulfing matter/food into the cell

Question 17

Pinocytosis

Answer 17

process of endocytosis involving engulfing waste/liquid into the cell

Question 18

Isotonic

Answer 18

equal amount of water entering and leaving the cell

Question 19

Hypertonic

Answer 19

shirinked cell

water is leaving the cell due to the high concentration of solutes outside the cell

Question 20

Hypotonic

Answer 20

swollen cell

water is entering the cell due to high concentration of solutes inside the cell

Question 21

How does distance effect rate of diffusion?

Answer 21

if the distance is small, the diffusion happens faster because the particles do not have a large distance to travel

Question 22

How does solubility effect rate of diffusion?

Answer 22

as the concentration gradient increases, rate of diffusion increases

as the concentration gradient decreases, rate of diffusion decreases

Question 23

How does temperature effect rate of diffusion?

Answer 23

the higher the temperature, the higher rate of diffusion

the lower the temperature, the lower rate of diffusion

Question 24

How does molecular weight effect rate of diffusion?

Answer 24

the high molecular weight, the lower rate of diffusion

the lower molecular weight, the higher rate of diffusion

Question 25

Agar Plate

Answer 25

in the center a drop of Silver Nitrate was added to the center of the plate because Ag+ will create precipitation bonds with the negative ions which enables measurement of rates of diffusion

1cm to the right of the center 2 drops of NaCl was added so the Ag+ can react with Cl-

1cm to the left of the center 2 drops of KBr was added so the Ag+ can react with Br-

1cm to the bottom of the center 2 drops of Fe(CN) was added so Ag+ can react with CN-3

Question 26

What is the molecular weight of Ferrincyanide? CN-3

Answer 26

212

Question 27

What is the molecular weight of Chloride? Cl-

Answer 27

35

Question 28

What is the molecular weight of Bromide? Br-

Answer 28

80

Question 29

How do you calculate rate of diffusion?

Answer 29

square root of 1 / Molecular Weight

lowest product will be divided and quotient of that is the rate

ex:
CN- 0.068/0.068= 1
Br- 0.11/0.068= 1.6
Cl- 0.17/0.068= 2.5 `

Question 30

Dialysis Tubing

Answer 30

semipermeable made of cellulose acetate

process of the removal of small molecular weight solutes from a solution

Question 31

Was the dialysis tube permeable to starch?

Answer 31

no

Question 32

Was the dialysis tube permeable to glucose?

Answer 32

yes

Question 33

Was the dialysis tube permeable to albumin?

Answer 33

no

Question 34

Was the dialysis tube permeable to iodine?

Answer 34

yes

Question 35

What net movement occured in the dialysis tubing?

Answer 35

there was a net movement of water into the dialysis tubing