Which hormone stimulates mammary glands to produce milk in nursing mothers?

Prolactin.

Explanation:

it is a lactogenic hornone that is produced in the anterior lobe of the pituitary gland. it serum levels increases with pregnancy where it increases the sizes of  mammary glands.

its control of milk production is regulated by progesterone during pregnancy. However ,as the  levels of progesterone drops, and suckling reflex  commences,   after birth, its lactogenic activities increases.

no, because those are both different running competitions. while distance runners train their legs and their lungs to run long amounts of time, the sprinters are training their legs and their lungs to give all they have in the little amount of area they need to cover. the brain also plays a huge part in all of this.

the brain is the only thing in your body that sends messages to your body telling you to run. if you are a long distance runner and you have the mind set of a sprinter, you will not get anywhere. if you have a long distance mind set and you have to run 200m in 20 seconds then you will not make it in time.