Download SBI4U – Homeostasis Cellular Transport Quiz 1. The sodium

SBI4U – Homeostasis
Cellular Transport Quiz
1. The sodium-potassium pump functions to pump
a) sodium ions out 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. In receptor linked channel proteins, when the acetylcholine receptor sites are not
occupied…
a) a ligand is formed
b) the sodium channels open
c) the sodium channels remain closed
d) sodium ions diffuse through and enter the cell
e) sodium ions diffuse through and leave the cell
3. Which of the following molecules will pass through a cell membrane most easily?
a) small polar
b) small nonpolar
c) large polar
d) large nonpolar
e) large neutral
4. Facilitated diffusion requires
a) enzymes
b) carrier proteins
c) lipid carriers
d) carbohydrate carriers
5. What is the source of energy used to power the sodium-potassium pump?
a) breakdown of ATP
b) formation of ATP
c) transport by the pump
d) breakdown of GTP
e) transport of GTP by the pump
6. 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
e) two tablespoons of coffee are added
7. When acetylcholine binds to the receptor sites on a ligand gated channel protein…
a) a ligand is formed
b) the sodium channels open
c) the sodium channels remain closed
d) sodium ions diffuse through and enter the cell
e) sodium ions diffuse through and leave the cell
8. 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+
9. A red blood cell placed in a hypertonic medium will
a) expand
b) burst
c) shrink
d) have no change in shape
e) become a white blood cell
10. Facilitated diffusion occurs
a) into the cell only
b) out of the cell only
c) in either direction depending on temperature
d) in either direction depending on the concentration gradient of the molecule
e) in either direction depending on the size of the molecule
11. Unlike simple diffusion, facilitated diffusion requires the expenditure of energy
by the cell
a) true
b) false
12. A 5% urea solution is hypotonic to a 10% urea solution
a) true
b) false
13. Facilitated diffusion is used to transport
a) sugars and amino acids
b) water and oxygen
c) carbon dioxide and oxygen
d) carbon dioxide and water
e) sugars and water
14. The molecules in a solid lump of sugar do not move
a) true
b) false
15. Osmosis is best defined as the movement of
a) molecules from an area of high to low concentration
b) molecules from an area of low to high concentration
c) water molecules across a membranc from an area of low water to an area of high
water concentration
d) water molecules across a membranc from an area of higher water concentration
to an area of lower concentration
e) water molecules inside a container