Lysosomes and peroxisomes are somewhat similar in origin and appearance, but have different functions.

• In most cells lysosomes are also more numerous.
• Study the role of primary and secondary lysosomes in intracellular digestion following endocytosis.
• “Residual bodies” consist of relatively dark material called lipofuscin granules containing indigestible substances in the remains of lysosomes which may persist in cells.
• This material is sometimes visible by LM in routinely stained cells, such as the neurons on and liver cells on.

What is the difference between a secretory vesicle and a secretory granule?

The enzymes in lysosomes are only active in a microenvironment with a pH of about 5. Why?

Why is lipofuscin sometimes called and age pigment?

Why are peroxisomes particularly abundant in neutrophils?

Mitochondria