Breast

Question 1

In what areas of the body can breast tissue be present?

Answer 1

anywhere along the milk line

Question 2

What form of secretion is used by a lactating breast?

Answer 2

merocrine and apocrine

Question 3

resting breast

Answer 3

blunt ducts in the lobule (no well-developed acini), inactive duct system

Question 4

physiological cycle of the breast

Answer 4

resting –> differentiation (pregnancy) –> involution (b/t pregnancies) –> atrophy (aging)

Question 5

physical stimulation of nursing releases…

Answer 5

(1) oxytocin which causes contraction –> milk release (2) production of prolactin, which maintains continued milk production by secretory acini

Question 6

What stimulates the transition from resting –> lactating breast?

Answer 6

prior to parturition, lactation is inhibited by high levels of placental estrogen + progesterone; these drop –> lactation begins under stim of prolactin