WEB Quiz Ch 5 Movement of materials & cells
http://highered.mcgraw-hill.com/sites/0072495855/student_view0/
Directions: Choose Chapter 2, watch videos and take the quizzes
Video & QUIZ “Sodium Potassium Pump” Names_______________________
Per_______
_____1. The sodium-potassium pump functions to pump
A. sodium ions out of the cell and potassium ions into the cell.
B. sodium ions into the cell and potassium ions out of the cell.
C. sodium and potassium ions into the cell.
D. sodium and potassium ions out of the cell.
E. sodium and potassium ions in both directions across the cell membrane.
2
______2. What is the source of energy used to power the sodium-potassium pump?
A. breakdown of ATP
B. formation of ATP
C. transport of ATP by the pump
D. breakdown of GTP
E. transport of GTP by the pump
3
______3. During one cycle, the sodium-potassium pump binds and moves.
A. 1 Na+ and 2 K+. B. 2 Na+ and 2 K C. 2 Na+ and 3 K+.
D. 3 Na+ and 2 K+. E. 3 Na+ and 3 K+.
4
4. The sodium-potassium pump is a trans-membrane protein.
True
False
5. The binding and release of sodium or potassium ions are due to conformational
changes in the protein.
True
False
Video & QUIZ “Facilated diffusion”
_______1. Facilitated diffusion requires
A. enzymes.
B. carrier proteins.
C. lipid carriers.
D. carbohydrate carriers.
E. lipid or carbohydrate carriers.
______2. Facilitated diffusion occurs
A. into the cell only.
B. out of the cell only.
C. in either direction depending on the temperature.
D. in either direction depending on the concentration gradient of the molecule.
E. in either direction depending on the size of the molecule.
3
______3. Facilitated diffusion is used to transport
A. sugars and amino acids. B. H2O and O2. C. CO2 and O2.
D. CO2 and H2O. E. sugars and H2O.
4. Unlike simple diffusion, facilitated diffusion requires energy expenditure by the
cell. TRUE
FALSE5
5. Facilitated diffusion requires a specific transporter for a specific molecule.
True
False
______6. Facilitated diffusion differs from active transport in that facilated diffusion
A. facilated diffusion expends no ATP
B. moves molecules from an area of higher concentration to one of lower concentration.
C. does not require a carrier protein for transport.
D. moves molecules in vesicles across a semipermeable membrane.
VIDEO & QUIZ: “Diffusion”
______1. Simple diffusion is defined as the movement of
A. molecules from areas of higher concentration to areas of lower concentration.
B. molecules from areas of lower concentration to areas of higher concentration.
C. water molecules across a membrane.
D. gas molecules across a membrane.
E. gas or water molecules across a membrane.
______2. When sugar is mixed with water, equilibrium is reached when
A. molecules of sugar stop moving
B. water and sugar molecules are moving at the same speed.
C. the dissolved sugar molecules are evenly distributed throughout the solution.
D. there are the same number of water molecules as dissolved sugar molecules.
E. two tablespoons of coffee are added.
______3. The rate of diffusion is affected by which of the following?
A. temperature
B. size of molecules C. steepness of the concentration gradient
D. A and B E. A, B and C
4. The molecules in a solid lump of sugar do not move.
True
False
5. Diffusion is one of the processes whereby materials are exchanged between a cell
and its environment.
True
False
VIDEO & QUIZ: “Phagocytosis” 1
______1. Phagocytes are attracted by all of the following except
A. phospholipids released by injured cells
B. components of the complement system
C. chemical products of microorganisms
D. lysosomes
______2. In phagocytosis the digested contents are eliminated by
A. endocytosis
B. exocytosis
C. opsonization D. C3b
3
______3. A lysosome
A. is found only inside the bacterium being ingested
B. is an organelle that makes a bacterium motile
C. contains lysozyme and proteases which digest bacteria
D. contains enzymes specific to the receptors on the bacterium being eliminated
4. Complement factor C3b coats a bacterium and binds to C3b receptors on phagocytes, making
the bacterium more susceptible to being phagocytized.
True
False
5
5. A phagosome containing the engulfed bacteria combines with a lysosome containing
enzymes to produce a phagolysosome. TRUE
FALSE