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LYSOSOMES
-Spherical membranous bags containing digestive enzymes
-Abundant in phagocytes
-Low pH in lysosome
-Digest ingested bacteria, viruses, and toxins
-Degrade nonfunctional organelles
-Breakdown glycogen and release thyroid hormone
-Breakdown nonuseful tissue and organelles
- Digest particles taken in by endocytosis
- Breakdown glycogen for enegry
-Breakdown bone to release Ca2+
-Secretory lysosomes are found in white blood cells, immune cells, and melanocytes
PEROXISOMES
-Membranous sacs containing oxidases and catalases
-Detoxify harmful or toxic substances
-Neutralize dangerous free radicals
-Free radicals – highly reactive chemicals with unpaired electrons (i.e., O2–)
- Oxidases + free radicals ----->H2O2 + catalase
28. Compare the functions of lysosomes and peroxisomes.
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