The hormone that stimulates the synthesis of milk in the mammary glands is:
A. Estrogen
B. Progesterone
C. Oxytocin
D. Prolactin
Answer: Option D
Solution (By JKSSB Mock Tests)
Prolactin, secreted by the anterior pituitary, is the primary hormone responsible for milk synthesis (lactation) after childbirth. Oxytocin causes milk ejection (let-down reflex). Estrogen and progesterone stimulate mammary duct and alveolar development during pregnancy but inhibit milk secretion; after delivery, their levels drop, allowing prolactin to act.
Explanation:
The holotype is the single physical specimen designated by the original author when the species is first formally described. It serves as the ultimate reference point for that species name. An isotype is a duplicate of the holotype, syntypes are multiple specimens cited when no holotype was designated, and paratypes are additional specimens cited in the original description.
Explanation:
Aspergillosis is an opportunistic fungal infection, often affecting the lungs, caused by inhalation of Aspergillus spores. Candidiasis is by Candida, ringworm by dermatophytes, histoplasmosis by Histoplasma.
Explanation:
The ureter is a muscular tube that carries urine from the renal pelvis of each kidney to the urinary bladder by peristalsis. The urethra carries urine from the bladder to the exterior. Renal pelvis collects urine from calyces, nephron is the functional unit.
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