Multiple choice

What percent of lactating dairy cows have oxytocin in their bloodstreams during milking?

  1. 60%

  2. 50%

  3. 100%

  4. 75%

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Oxytocin is the hormone responsible for milk letdown. During the milking process, a healthy cow will release oxytocin into the bloodstream to cause the contraction of the alveoli in the udder.