Answer: Prolactin
Explanation: During breastfeeding the anterior pituitary gland in the brain releases hormone prolactin as part of positive feedback mechanism. A mothers alveoli will collect nutrients from the blood and convert them into milk. Another hormone oxytocin, causes the muscles around the breast to eject milk (a let-down reflex) whilst a baby is sucking.
A sucking baby is actually a positive feedback that causes the brain to release more prolactin, which in turn causes the alveoli to convert more sugars and nutrients into milk.
Predisposed mean increased the risk of developing cancer. In most case, it doesn't mean that you will 100% develop cancer but your chance will be much higher than other people.
That risk also can be increased if you doing risky behavior like sunbathing. Again, that doesn't mean you automatically get cancer someday.
Answer: I think you meant scientists and scientists often gather new knowledge by studying the experiments of others
Explanation:
The correct answer is C. The right side of the heart delivers deoxygenated blood (from vena cava) to the lungs (via pulmonary artery)
