Biology Study Guide

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AP BIOLOGY
CELL UNIT
ACTIVITY #5

NAME_____________________
DATE___________HOUR_____

CELL TRANSPORT
MEMBRANE PROPERTIES

PASSIVE TRANSPORT
CHARACTERISTICS:
DIFFUSION:

Cell Unit Activity #5 page 1

OSMOSIS :
ISOTONIC

ANIMAL CELLS

Cell Unit Activity #5 page 2

HYPOTONIC

HYPERTONIC

PLANT CELLS

OSMOREGULATION – ADAPTATIONS
Paramecium

Fresh Water Bony Fish

FACILITATED D IFFUSION:

Cell Unit Activity #5 page 3

Marine Bony Fish

ACTIVE TRANSPORT
CHARACTERISTICS:
NA+/K+ PUMPS:

OTHER EXAMPLES :

Cell Unit Activity #5 page 4

COTRANSPO RT:

TRANSPORT OF LARGE MOLECULES :

Cell Unit Activity #5 page 5

TYPES OF ENDOCYTOSIS

PHAGOCYTOSIS

PINOCYTOSIS

RECEPTOR-MEDIATED
ENDOCYTOSIS

QUESTIONS:
1.

Use the key below to indicate how each class of materials is transported across the membrane.
A. Diffuses through the membrane.
B. Small enough to pass through the spaces between the phospholipid molecules.
C. Requires the assistance of transport proteins.
______ Nonpolar materials

______ Water

______ Ions

______ Large polar uncharged
molecules

______ Small polar uncharged
molecules

Cell Unit Activity #5 page 6

2.

What is the role of transport proteins in biological membranes? _____________________________________________________________ _____________________________________________________________

3.

Describe how each of the following affect the rate of diffusion. a.
b.

4.

Molecular size:____________________________________________
Temperature:_____________________________________________

A semipermeable sac, containing 4% NaCl, 9% glucose, and 10% albumin, is suspended in a solution with the following composition: 10% NaCl, 10% glucose, and 40% albumin. Assume the sac is permeable to all substances except albumin. Use the key provided to determine how each substance will move.

______ Glucose

A.

Moves into the sac

______ Albumin

B.

Moves out of the sac

______ Water

C.

Does not move

______ NaCl
5.

The diagrams below show three microscopic fields (A-C) containing red blood cells. Arrows indicate the direction of net water movement. Answer the following questions.

a.

Which microscopic field shows a hypertonic environment?__________

b.

Which microscopic field shows a cell hypertonic to its environment? ________________________________________________________

c.

Which microscopic field shows an isotonic environment?____________

Cell Unit Activity #5 page 7

d.

Describe what is happening to the cells in Field C.
________________________________________________________
Explain why this is happening.________________________________ ________________________________________________________

6.

The table below describes the experimental procedure designed to investigate the effect of temperature and concentratio n on the rate of diffusion.
Beaker A

Beaker B

Beaker C

Beaker D

Beaker E

Beaker F

Fill with 200
mL of tap
water

Fill with 200
mL of tap
water

Room
Temp .

Room
Temp.

Place 5 g of
potassium
permangana
te crystals in
beaker

Place 10 g of
potassium
permangana
te crystals in
beaker

Fill will 200
mL of tap
water
Place 4 ice
cubes in
beaker
Place 5 g of
potassium
permangana
te crystals in
beaker

Fill will 200
mL of tap
water
Place 4 ice
cubes in
beaker
Place 10 g of
potassium
permangana
te crystals in
beaker

Fill will 200
mL of tap
water
Heat beaker
until water
boils
Place 5 g of
potassium
permangana
te crystals in
boiling water

Fill will 200
mL of tap
water
Heat beaker
until water
boils
Place 10 g of
potassium
permangana
te crystals in
boiling water

Do not stir.

Do not stir.

Do not stir.

Do not stir.

Do not stir.

Do not stir.

Time how
long water
takes to
become
completely
colored

Time how
long water
takes to
become
completely...
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