AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What happens to the cell membrane during exocytosis?
A
Molecules pass directly through the phospholipids
B
A vesicle fuses with the membrane and releases its contents out of the cell.
C
Molecules use a transport protein to enter the cell.
D
Water flows towards the higher solute concentration side of the membrane.
Explanation: 

Detailed explanation-1: -Exocytosis in many ways is the reverse process from endocytosis. Here cells expel material through the fusion of vesicles with the plasma membrane and subsequent dumping of their content into the extracellular fluid.

Detailed explanation-2: -The steps of exocytosis The vesicle travels to the cell membrane. The vesicle fuses to the plasma membrane, during which the two bilayers merge. The vesicle’s contents are released into the extracellular space. The vesicle either fuses with or separates from the cell membrane.

Detailed explanation-3: -In exocytosis, a vesicle (a small, membrane-bound compartment) containing the molecules to be released fuses with the cell membrane, and the contents of the vesicle are expelled. Exocytosis is important for the transport of neurotransmitters.

Detailed explanation-4: -Exocytosis describes the process of vesicles fusing with the plasma membrane and releasing their contents to the outside of the cell. Both endocytosis and exocytosis are active transport processes.

Detailed explanation-5: -In exocytosis, waste material is enveloped in a membrane and fuses with the interior of the plasma membrane. This fusion opens the membranous envelope on the exterior of the cell and the waste material is expelled into the extracellular space.

There is 1 question to complete.