The structure in the breast where milk is produced, where the hormonal and nutritional exchange occurs, and where the majority of breast cancers arise is the .

The response is mammary epithelial cells

Explanation:

Milk is produced by mammary epithelial cells. Moreover, breast cancer cell lines derived from mammary epithelial cells have also been used to show the association between aberrant gene expression patterns and the tumorigenic status

for question 8

1: it gets the blood pumping more

2: endorphins and other neurotransmitters

answer 2 is the right one. jim should measure his snack to make sure he is using the right serving size.