Osmosis and Diffusion
This organelle is involved in the transport of things in and out of the cell in osmosis and diffusion.
a. proteins
b. phospholipids
c. cell membrane
d. mitochondria
C. cell membrane
When cells move in and out of the cell using the cell membrane and a vesicle, the process is either __________ or _________________.
a. endocytosis
b. exocytosis
c. sodium/potassium pump
d. A and B
e. B and C
d. A and B
The composition of the cell membrane.
a. phospholipids
b. phospholipid bilayer
c. phospholipid trilayer
d. phospholipid layers
b. phospholipid bilayer
Passive transport requires no energy to move molecules from an area of _______ concentration to an area of ________ concentration.
a. high to low concentration
b. low to high concentration
c. low to low concentration
d. high to high concentration
a. high to low concentration
The cell using its own energy to move molecules across the plasma membrane against the concentration gradient is known as
a. simple diffusion
b. osmosis
c. passive transport
d. active transport
d. active transport
This process occurs when substances move in and out of the cell from areas of high concentration to areas of low concentration.
a. osmosis
b. exocytosis
c. diffusion
d. sodium-potassium pump
c. diffusion
The primary difference between passive transport and active transport is that active transport uses __________ while passive transport does not.
a. the cell membrane
b. proteins
c. ATP (energy)
d. phospholipids
C. ATP (energy)
Since the fatty acid tails of the phospholipid bilayer are ____________ the cell membrane is selectively permeable.
a. hydrophilic
b. hydrophobic
c. polar
a. hydrophobic
The passive transport mechanism by which small, nonpolar molecules like oxygen and carbon dioxide or lipid soluble molecules pass directly through the cell membrane.
a. facilitated diffusion
b. osmosis
c. endocytosis
d. simple diffusion
Energy for the Sodium-Potassium pump comes from this molecule.
a. ATP
b. phospholipids
c. DNA
d. nucleic acids
a. ATP
This process occurs when water moves in and out of the cell.
a. active transport
b. osmosis
c. diffusion
d. facilitated diffusion
b. osmosis
The transport mechanism that brings large particles into the cell using the cell membrane and a vesicle is called this.
a. exocytosis
b. pumps
c. facilitated diffusion
d. endocytosis
These macromolecules are embedded in the cell membrane and serve a number of functions. Some function as channels or membrane pores; others as carrier molecules. Some bind signal molecules while others play a role in cell recognition.
a. phospholipids
b. carbs
c. nucleic acids
d. proteins
d. proteins
Mechanism of glucose transport across cell membranes.
a. simple diffusion
b. facilitated diffusion
c. osmosis
d. carbohydrate transport
b. facilitated diffusion
Energy for the cell is produced in this organelle.
a. chloroplast
b. mitochondrion
c. nucleus
d. cell membrane
b. mitochondrion
Higher concentration of dissolved substance in relation to another solution.
a. hypotonic
b. hypertonic
c. isotonic
b. hypertonic
When small particles enter the cell using a protein, but no energy, this type of transport mechanism is being used.
a. active transport
b. diffusion
c. facilitated diffusion
d. osmosis
c. facilitated diffusion
The __________ ___________ of the membrane are directed to the outside of the cell membrane in contact with the cytoplasm and extracellular fluid.
a. phosphate heads
b. phosphate tails
c. fatty acid heads
d. fatty acid tails
a. phosphate heads
Passive Transport occurs ___________the concentration gradient.
a. against
b. along
b. along
The active transport mechanism that drives 3 sodium ions out of the cell in exchange for 2 potassium ions into the cell.
a. endocytosis
b. exocytosis
c. sodium-potassium pump
d. cell membrane
c.sodium potassium pump
Difference in concentration across a membrane.
a. concentration gradient
b. cell membrane
c. low concentration
d. high concentration
a. concentration gradient
The type of protein that is used to help transport larger molecules in and out of the cell membrane. This protein can be used for active or passive transport.
a. transport protein
b. helper protein
c. channel protein
d. amino acid
A. transport protein
The state in which the distribution of a substance is even across the cell membrane.
a. homeostasis
b. equilibrium
c. hypertonic
d. osmosis
b. equilibrium
What solution has a concentration of solutes is the same inside and out?
a. hypertonic
b. hypotonic
c. isotonic
d. tonic
c. isotonic
Active transport uses energy to move molecules ________ their concentration gradient from _______ to ________ concentration.
a. with; high to low
b. with; low to high
c. against; high to low
d. against; low to high
d. against; low to high