Question

part a - exocytosis and endocytosis sort the phrases into the appropriate bins depending on whether they describe exocytosis, endocytosis, or both. view available hint(s) reset help decreases the surface area of the plasma membrane requires cellular energy forms vesicles from inward folding of the plasma membrane transported substances never physically cross the plasma membrane requires fusion of vesicles with the plasma membrane increases the surface area of the plasma membrane secretes large molecules out of the cell exocytosis endocytosis both

Explanation:

• Exocytosis: Involves vesicles fusing with the plasma membrane to secrete large molecules out of the cell, increasing the plasma membrane's surface area (as vesicles add to it) and requires energy. The key actions are fusion with the membrane, secretion out, and increasing surface area.
• Endocytosis: Involves inward folding of the plasma membrane to form vesicles (bringing substances in), decreasing the plasma membrane's surface area (as membrane is used to form vesicles) and requires energy. The key actions are forming vesicles from the membrane, bringing in, and decreasing surface area.
• Both: Both processes are active transport mechanisms, so they require cellular energy, and transported substances never physically cross the plasma membrane (they are moved via vesicles).

Exocytosis:

• requires fusion of vesicles with the plasma membrane
• increases the surface area of the plasma membrane
• secretes large molecules out of the cell

Endocytosis:

• decreases the surface area of the plasma membrane
• requires cellular energy
• forms vesicles from inward folding of the plasma membrane

Both:

• requires cellular energy
• transported substances never physically cross the plasma membrane

Answer:

• Exocytosis: requires fusion of vesicles with the plasma membrane, increases the surface area of the plasma membrane, secretes large molecules out of the cell
• Endocytosis: decreases the surface area of the plasma membrane, forms vesicles from inward folding of the plasma membrane
• Both: requires cellular energy, transported substances never physically cross the plasma membrane