The human enzyme that breaks down hydrogen peroxide in the body is found in which organelle?
A. Golgi body
B. Peroxisome
C. Lysosome
D. Nucleus
Answer: Option B
Solution (By JKExamLibrary)
Peroxisomes contain catalase and other oxidases that detoxify hydrogen peroxide and other harmful substances. They also play a role in lipid metabolism. Lysosomes contain hydrolytic enzymes, Golgi modifies proteins, nucleus houses DNA. Peroxisomes are abundant in liver and kidney cells.
Explanation:
Glucagon is secreted by alpha cells of the islets of Langerhans when blood glucose is low. It acts on the liver to stimulate glycogenolysis (glycogen to glucose) and gluconeogenesis (synthesis of glucose from non-carbohydrates), thereby increasing blood glucose. Insulin, from beta cells, lowers blood glucose. Somatostatin inhibits both.
Explanation:
Syphilis is a sexually transmitted infection caused by the spirochete Treponema pallidum. Gonorrhea is Neisseria gonorrhoeae, chlamydia Chlamydia trachomatis.
Explanation:
The endocrine islets of Langerhans in the pancreas contain alpha cells that secrete glucagon and beta cells that secrete insulin, which regulate blood glucose. The liver stores and releases glucose, the spleen filters blood, the kidneys excrete waste. The pancreas also has exocrine functions secreting digestive enzymes.
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