MICROANATOMY

Detailed explanation-1: -Lysosomes are involved with various cell processes. They break down excess or worn-out cell parts. They may be used to destroy invading viruses and bacteria. If the cell is damaged beyond repair, lysosomes can help it to self-destruct in a process called programmed cell death, or apoptosis.

Detailed explanation-2: -(vii) Endo-lysosomes or small vesicles derived from endo-lysosomes fuse with the plasma membrane in a Ca2+-dependent manner, which contributes to both conventional and unconventional protein secretion.

Detailed explanation-3: -Secretory lysosomes are dual-function organelles in that they are used as both the lysosome (for degradation) and for storage of secretory proteins of the cell. These specialized organelles are found in a small set of cells, most of which are derived from the haematopoietic lineage.