In an electrone micrograph you can see invaginations of the cytolemma and dense structures in the cytoplasm. What process is it?

In an electrone micrograph you can see invaginations of the cytolemma and dense structures in the cytoplasm. What process is it?

1.  Exocytosis


2.  Pinocytosis


3.  Cytopempsis


4.  Clasmatosis


5.  *Phagocytosis