Cell Transport Homework Packet
Cell Transport Homework Packet
· “Cell Transport HW #1” (correlates to page 1 of notes)
· “Cell Transport HW #2” (correlates to pages 2-4 of notes)
· “Cell Transport HW #3" (correlates to pages 4-6 of your notes)
· "Cell Transport HW #4" (correlates to page 4-6 of your notes)
· “Cell Transport HW #5” (correlates to pages 7-8 of your notes)
· “Cell Transport HW #6” (correlates to pages 9-12 of your notes)
· "Cell Transport HW #7" (correlates to pages 9-12 of your notes)
· “Sponge Bob’s Big Adventure” assignment (in a separate packet)
· “Cell Transport HW #8” (correlates to page 13-14 of your notes)
· Please complete 7.3 Assessment Questions on Page 213 of your text.
· "Cell Transport HW#9" (correlates to all pages of your notes)
Also available: additional Review Worksheets
Cell Transport HW #1
(see p. 1 of notes)
The picture below represents a tiny blood vessel (called a capillary) with body cells surrounding it. Blood within the capillary will transport substances to the cells and collect wastes from cells.
Use the following 4 choices for questions 1 & 2:
a) nutrients b) oxygen c) carbon dioxide d) waste materials
1) Which of the above materials will diffuse from the blood into the cells? __nutrients and oxygen_________________
2) Which of the above materials will diffuse from the cells into the blood? _______carbon dioxide and waste______
3) In order for oxygen to diffuse into the cells, what must the concentration of oxygen in the cell be in
comparison to the concentration of oxygen in the blood?
_____________ The concentration of oxygen in the cell should be lower than in the blood in order to get oxygen to diffuse into the cell from the blood._______________________________________ _____________
4) In order for carbon dioxide to diffuse out of the cells, what must the concentration of carbon dioxide in the
blood be? The concentration of carbon dioxide in the blood should be lower than in the cell in order to get carbon dioxide to diffuse out of the cells into the blood.___________________________________
Cell Transport HW #2 (See pages 2-4 of your notes)
1. What two types of organic molecules is the cell membrane mostly composed of? (choose two)
d. nucleic acids
2) On the diagram at right, use letters to label :
a) a phospholipid
b) the phosopholipid bilayer
c) two different transport proteins
______3. Cellular transport takes place in which of the following organisms?
a) unicellular only
b) mullticellular only
c) only organisms which have a circulatory system
d) all organisms
4. The cell shown above appears to be permeable to which substance(s) (A, B, C?)?
5. The cell shown above appears to be impermeable to which substance(s)? (A, B, C?)?___A, B______
6. A membrane which is only permeable to certain substances is called selectively permeable
7. Cells must be able to exchange materials into and out of cells in order to maintain a state of balance otherwise known as ____homeostatsis______
8. Any type of cell transport which does NOT require an input of cellular energy is called _____passive__________transport.
______ 9. A cell membrane allows substance X into the cell. It does not allow substance Y into
the cell. Which of the following are true? (Draw a picture if it will help.)
A. the membrane is impermeable to both X and Y
B. the membrane is permeable to both X and Y
C. the membrane is permeable to Y but impermeable to X
D. the membrane is selectively permeable
10. Fill in the blanks of the diagram using the word bank given.
11. Which term means “water-loving”?
12. We know that the “heads” of the phospholipids face out towards the environment and cell cytoplasm. Which parts of the phospholipids are in the interior of the cell membrane?________ Hydrophobic tails____________
_______13. Choose which of the following statements is FALSE.
a. Nucleic acids are important components of the cell membrane.
b. Carbohydrates on the outside surface of the cell membrane help cells identify each other.
c. Proteins in the membrane may form channels or pumps to help transport certain materials.
d. Some proteins attach to the cytoskeleton and help a cell to move or change shape.
_______14. Which of the following is NOT a type of passive transport?
a. diffusion b. osmosis
c. facilitated diffusion
d. all of these are passive
Cell Transport HW #3 (see pages 4-6 of your notes)
1. Particles of matter are in constant random motion. They move faster when temperatures are ___higher__.
____________2. A solute dissolved into a solvent makes a mixture called a __?__.
____________3. The process of diffusion is the movement of molecules from an area
of __?__ concentration to an area of lower concentration.
____________4. Which of the following solutions is the LEAST concentrated?
a. 5 grams of sugar in 100 mL of water
b. 10 grams of sugar in 100 mL of water
c. 15 grams of sugar in 100 mL of water
Use the following example to answer questions 5-8: Nicholas, a pharmacist, had to prepare a 5% solution of salt water (also called saline solution) for a customer. In order to do this, he should mix 5 grams of salt with 100ml of water.
______ salt ______________5. What is the solute in the example?
_____ water _______________6. What is the solvent in the example?
_____95%_______7. What is the percentage of water in the above solution?
____________8. OOPS!! Suppose Nicholas thought the prescription said “10%” instead
of “5%”. What will he do wrong when he makes the 10% solution?
a. he will add too little salt
c. he will use sugar instead of salt
b. he will add too much salt
d. he will use milk instead of water
_______9. When dynamic equilibrium is reached,
a. molecules continue to diffuse from an area of high concentration to an area of low concentration
b. molecules begin to diffuse from an area of low concentration to an area of high concentration
c. molecules continue to move randomly in all directions but there is no net movement of molecules
d. a very large (strong) concentration gradient exists.
10. Label each of the pictures below with high concentration gradient, low concentration gradient, and zero concentration gradient.
high concentration gradient
low concentration gradient
zero concentration gradient.
_______11. Diffusion of tea particles in a glass of water requires :
a) no energy
b) thermal energy c) energy from ATP
Which of the following must be true for diffusion to occur?
Molecules or particles must have different sizes.
Special protein channels must always be available.
There must be areas of different concentrations.
Energy must be available.
Which term refers to the condition that exists when no net change in concentration results from diffusion?
Air has a higher concentration of oxygen molecules than does the cytoplasm of your lung cells. Where in your lungs will there be a net increase of oxygen?
in the air breathed in
outside of the lung cells
in the air breathed out
inside of the lung cells
Diffusion is the movement of particles
from an area of high concentration to
an area of low concentration. Osmosis
is the diffusion of water through a
selectively permeable membrane.
Study the beakers at the right. The
arrows between beakers tell you
what process is occurring.
1. In the beakers on the right,
draw the result of the described
process. Draw changes in water
levels. Draw changes in the number
of solute particles. Remember to
draw on both sides of the
2. Look at the top left beaker. What
would happen if the membrane did
not allow water or solute particles
to pass through it?
water would move from right side to left
Cell Transport HW #4 (see pages 4-6 of your notes)
· Two sides of a container are separated by a membrane permeable to both water and iodine.
BEGINNING OF THE EXPERIMENT:
The left side of the membrane contains solution of water( H2O) and iodine (KI).
The right side of the membrane contains pure water.
· The picture below shows the apparatus after it is allowed to sit for a period of time.
End of the experiment
1) In the illustration above, which substance (water or iodine) is the solute? ____iodine______
2) Which substance is the solvent? ________water____________