Endocytosis, exocytosis, phagocytosis

1. VESICLE TRANSPORT

2. What is Endocytosis?
Materials in the extracellular fluid
are engulfed by a vesicle, which then
empties its contents in the
intracellular fluid

4. Endocytosis
• Pinocytosis: plasma membrane folds
inward, forming a pinocytic vesicle
• Phagocytosis: plasma membrane
engulfs the solid material
• Receptor mediated endocytosis:
specific molecules bind to specialized
receptors

5. Pinocytosis
• Extracellular fluid
• Rich in nutrients

6. Pinocytosis

7. Phagocytosis
• Larger particles
• Lysosome joins the vesicle, empties
its digestive enzyme to break down
the particles

8. Phagocytosis