The hormone that promotes the development of the corpus luteum after ovulation is:
A. Estrogen
B. FSH
C. Prolactin
D. LH
Answer: Option D
Solution (By JKExamLibrary)
Luteinizing hormone (LH) triggers ovulation and then promotes the formation and maintenance of the corpus luteum from the ruptured follicle. The corpus luteum secretes progesterone. FSH stimulates follicle growth, prolactin milk production, estrogen from follicles.
Explanation:
The pleural cavity between the visceral and parietal pleura contains a thin layer of pleural fluid, lubricating the surfaces to reduce friction during lung expansion and contraction. Synovial fluid is in joints, cerebrospinal fluid surrounds the CNS, lymph is in the lymphatic system. Pleural effusion is excess accumulation.
Explanation:
Peroxisomes are single-membrane organelles containing oxidative enzymes like catalase and urate oxidase. They break down fatty acids via β-oxidation and detoxify hydrogen peroxide. Lysosomes contain hydrolytic enzymes, mitochondria energy, Golgi packaging. Peroxisomes are abundant in liver and kidney cells.
Explanation:
Lactase is a brush border enzyme in the small intestine that hydrolyzes lactose (milk sugar) into its constituent monosaccharides. Maltase acts on maltose, sucrase on sucrose, amylase on starch. Lactose intolerance results from lactase deficiency.
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