Which hormone is released in response to teat stimulation and causes milk letdown in a dairy cow?
Correct answer: B. Oxytocin
- A. Progesterone
- B. Oxytocin
- C. Follicle stimulating hormone
- D. Cortisol
Explanation
Teat stimulation causes release of oxytocin from the posterior pituitary, producing contraction of myoepithelial cells around the alveoli. Progesterone supports pregnancy, while follicle stimulating hormone acts mainly in ovarian follicle development.
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