Question

in active transport, view available hint(s) the plasma membrane forms a pocket that pinches inward, forming a vesicle that contains material from outside the cell. no energy input is required from the cell. a vesicle inside the cell fuses with the plasma membrane and releases its contents outside the cell. molecules move across the plasma membrane by crossing the lipid bilayer directly, rather than by using a transport protein. molecules move across the plasma membrane against their concentration gradient. submit part b a molecule moves down its concentration gradient using a transport protein in the plasma membrane. this is an example of view available hint(s) endocytosis. exocytosis. facilitated diffusion. diffusion. active transport. submit

Explanation:

Active transport is the movement of molecules across a cell - membrane against their concentration gradient, which requires energy input from the cell. Facilitated diffusion is the movement of molecules down their concentration gradient with the help of a transport protein in the plasma membrane. Endocytosis is when the plasma membrane forms a pocket that pinches inward to form a vesicle with outside - cell material. Exocytosis is when a vesicle inside the cell fuses with the plasma membrane to release its contents outside the cell. Diffusion is the movement of molecules across the plasma membrane by crossing the lipid bilayer directly without a transport protein (in simple diffusion) or with a transport protein (in facilitated diffusion when moving down the gradient).

Answer:

Part A: molecules move across the plasma membrane against their concentration gradient.
Part B: facilitated diffusion