BIO 156: Chapter 5-Membrane Components
1. Label the structures of the plasma membrane in the diagram below.
2. The plasma membrane, according to the fluid mosaic model is composed mainly of ___________________ and
proteins.
3. Each phospholipid molecule consists of two parts:
 A polar head that is (hydrophobic/hydrophilic).
 A pair of non-polar tails that are (hydrophobic/hydrophilic).
4. In plasma membranes, phospholipids arrange themselves into a bilayer.
 The polar heads of the bilayer face____________________.
 The non-polar tails of the bilayer face ____________________.
5. _____________________is lipid soluble and aids in stability, and flexibility of the plasma membrane.
6. There are various different types of transport proteins:
 ________________________protein: the protein that forms a channel of a pore
 ________________________protein: the protein that bind molecules and change shape to shuttle them
across the membrane.
 _________________________ : protein that transports water across the membrane
 Proteins found in the plasma membrane that have carbohydrates covalently attached are
called________________________________.
 Lipids found in the plasma membrane that have carbohydrates covalently attached are
called________________________________.
BIO 181: Chapter 7: Transport
1. Complete the table by checking the correct column for each statement:
Statement
Hypotonic Solution
Isotonic Solution
Hypertonic Solution
High solute
concentration inside
the cell.
Solute concentration is
the same inside and
outside the cell.
Solute concentration is
higher outside the cell
Results in Osmosis
2. Plant cells have specific vocabulary terms depending on the tonicity of the solution. List those terms below.
Hypotonic:____________________
Isotonic:____________________
Hypertonic:____________________
3. Match the term with its correct description:
a. ATP (cellular energy)
b. Facilitated diffusion
c. Endocytosis
d. Passive transport
e.
f.
g.
h.
Active transport
Exocytosis
Carrier protein
Channel protein
_____Transport protein that provides a tube-like opening in the plasma membrane through which particles can diffuse
_____Is used during active transport but not passive transport
_____Process by which a cell takes in material by forming a vacuole around it
_____Particle movement from an area of higher concentration to an area of lower concentration
_____Process by which a cell expels waste from a vacuole
_____A form of passive transport that uses transport proteins
_____Particle movement from an area of lower concentration to an area of higher concentration
_____Transport protein that changes shapes when a particle binds with it
Match the term with its correct description:
a. Transport protein
d. Passive transport
b. Active transport
e. Osmosis
c. Diffusion
f. Endocytosis
_____The diffusion of water through a cell membrane
g. Exocytosis
h. Equilibrium
_____The movement of substances through the cell membrane without the use of cellular energy
_____Used to help substances enter or exit the cell membrane
_____When energy is required to move materials through a cell membrane
_____When the molecules of one substance are spread evenly throughout another substance to be balanced
_____A vacuole membrane fuses (becomes a part of) the cell membrane and the contents are released inside the cell.