The female sex hormone produced by the corpus luteum is:
A. Estrogen
B. Progesterone
C. Testosterone
D. Prolactin
Answer: Option B
Solution (By JKSSB Mock Tests)
The corpus luteum, formed after ovulation, secretes progesterone (and some estrogen) to maintain the uterine lining for pregnancy. If no fertilization, it degenerates, causing menstruation. Estrogen is also produced by growing follicles, testosterone by Leydig cells, prolactin by anterior pituitary.
Explanation:
Robert Koch identified Mycobacterium tuberculosis as the causative agent of tuberculosis in 1882, applying his postulates. He also discovered the cholera bacillus. Pasteur worked on vaccines, Jenner smallpox, Lister antisepsis.
Explanation:
Gastrin is a hormone secreted by G cells in the stomach antrum, stimulating parietal cells to secrete HCl and promoting gastric motility. It is released in response to food in the stomach.
Explanation:
The oblique entry of the ureters into the bladder creates a valve-like effect, preventing reflux. The urethral sphincter controls urination.
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