Exam 4- Lactation Flashcards
what two hormones are the key players in lactation?
oxytocin
prolactin
when does lobuloalveolar growth occur?
during pregnancy
what is colostrum rich in?
protein
carbohydrate
fat
electrolytes
vitamins
why is colostrum so important for foals, piglets, and ruminants?
5-6 layers in placenta inhibit movement of antibodies from maternal blood to fetus through placenta
what immunoglobulin concentrations are elevated in colostrum?
IgG, IgM, IgA
what percent of milk is made up by triglycerides?
99%
what does prolactin promote?
milk synthesis and secretion
what hormones from the pituitary are essential for lactation?
prolactin
oxytocin
ACTH (and cortisol)
antidiuretic hormone
what hormones suppress lactation?
estrogen
progesterone
catecholamines (SNS)
why are glucocorticoids important in lactation?
required for onset and maintenance of lactation
promote actions of prolactin
how does aldosterone help lactation?
maintains blood volume and pressure
what does lactation do with antidiuretic hormone?
enhances ADH release, which decreases urinary water loss
what does parathyroid hormone have to do with lactation?
increases calcium availability
is insulin required for lactation?
yes
is parathyroid hormone required for lactation?
no