[Campbell Biology P.175] Which of the following statements accurately describe characteristi... | Practice Question

Which of the following statements accurately describe characteristics of bulk transport across the plasma membrane, as presented in the text and diagram?

  • A: It is a form of passive transport primarily for small molecules.
  • B: It includes both exocytosis and endocytosis.
  • C: Exocytosis involves vesicles fusing with the plasma membrane to secrete substances.
  • D: Endocytosis involves the plasma membrane pinching inward to take in substances.
  • E: It always requires energy investment.

Explanation

Key Concept 7.5 states, 'Bulk transport across the plasma membrane occurs by exocytosis and endocytosis.' The diagram explains that exocytosis secretes large molecules via vesicle fusion and endocytosis takes in large molecules by pinching inward. These processes are energy-dependent.