Membrane Transport Systems
• Which of the following vesicular transport
processes moves material out of the cell?
• A) phagocytosis
• B) exocytosis *
• C) receptor-mediated endocytosis
• D) pinocytosis
• About 75% of the lipids in the plasma
membrane are _____________________.
• A) cholesterol
• B) glycolipids
• C) lipoproteins
• D) phospholipids *
• Proteins that pass from one side to the other
of a plasma membrane are called
• A) integral or transmembrane proteins *
• B) glycoproteins
• C) receptor proteins
• D) channel proteins
• Which is NOT a type of cell junction?
• A) desmosome
• B) tight junction
• C) ribosomal junction *
• D) gap junction
• Which one of these terms refers to fluid inside
• A) interstitial fluid
• B) extracellular fluid
• C) intracellular fluid *
• D) tissue fluid
• The movement of particles WITH the
concentration gradient (High to low) that
requires the help of a carrier molecule is
• A) vesicular transport
• B) active transport
• C) osmosis
• D) facilitated diffusion *
• Name the membrane proteins that enable the
body to distinguish self from non-self.
• A) cell-adhesion molecules *
• B) receptors
• C) enzymes
• D) cell-identity markers
• Which of the following membrane transport
processes requires the cell to expend energy?
• A) osmosis
• B) endocytosis *
• C) facilitated diffusion
• D) simple diffusion
• _________________ proteins allow water and
hydrophilic solutes to pass through the plasma
membrane, or they may be gated to allow the
passage of material through them
• A) Receptor
• B) Enzyme
• C) Channel *
• D) Negative
• Which of the following statements about the
Na+/K+ pump is FALSE?
a. It transports Na+ out of the cell and K+ into
b. It transports Na+ and K+ in a 1:1 ratio. *
c. It is present in neurons.
d. Its activity requires the expenditure of
metabolic (cellular) energy.