Bulk Transport

Review Questions

What happens to the membrane of a vesicle after exocytosis?

  1. It leaves the cell.
  2. It is disassembled by the cell.
  3. It fuses with and becomes part of the plasma membrane.
  4. It is used again in another exocytosis event.

Hint:

C

Which transport mechanism can bring whole cells into a cell?

  1. pinocytosis
  2. phagocytosis
  3. facilitated transport
  4. primary active transport

Hint:

B

In what important way does receptor-mediated endocytosis differ from phagocytosis?

  1. It transports only small amounts of fluid.
  2. It does not involve the pinching off of membrane.
  3. It brings in only a specifically targeted substance.
  4. It brings substances into the cell, while phagocytosis removes substances.

Hint:

C

Many viruses enter host cells through receptor-mediated endocytosis. What is an advantage of this entry strategy?

  1. The virus directly enters the cytoplasm of the cell.
  2. The virus is protected from recognition by white blood cells.
  3. The virus only enters its target host cell type.
  4. The virus can directly inject its genome into the cell’s nucleus.

Hint:

C

Which of the following organelles relies on exocytosis to complete its function?

  1. Golgi apparatus
  2. vacuole
  3. mitochondria
  4. endoplasmic reticulum

Hint:

A

Imagine a cell can perform exocytosis, but only minimal endocytosis. What would happen to the cell?

  1. The cell would secrete all its intracellular proteins.
  2. The plasma membrane would increase in size over time.
  3. The cell would stop expressing integral receptor proteins in its plasma membrane.
  4. The cell would lyse.

Hint:

B