Breast milk production is largely driven by the demands of the baby. Therefore, the reason that women generally produce less milk after the baby is 6 months old is that
A. babies are typically also consuming complementary foods at 6 months of age and require less milk to meet nutrient needs.
B. cells in the alveolus become less responsive to prolactin after 6 months of lactation.
C. oxytocin levels become high after 4 months, which results in greater milk losses than the production can keep up with.
D. according to recommendations, babies are no longer breastfeeding at 6 months of age so milk production stops because the baby is now eating only complementary foods.
Question 2
The reason(s) that recommendations for calcium intake do not change for the mother during pregnancy is (are)
A. that although the mother excretes more calcium than usual, she also absorbs more than usual.
B. that calcium absorption is increased and calcium excretion is reduced in a pregnant woman.
C. that calcification of bone in the fetus occurs mainly after birth.
D. that fetal requirements for calcium are actually quite small.
(a) Solar-driven air circulation
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