10.2 Colostrum

Question 1

thick, yellow mammary gland secretion

Answer 1

colostrum

Question 2

Start & duration of secretion (colostrum)

Answer 2

several days before & a week after parturition (depending on animal species)

Question 3

Ideal time of ingestion (colostrum)

Answer 3

1st few hours after birth

Question 4

Immunoglobulins colostrum % & milk %

Answer 4

6%
0.09%

Question 5

In newborn piglets: The _____ ______ _____
are very high during the first few hours; and it actually decreases by 8 hrs after the start of nursing.

Answer 5

protective colostral antibodies

Question 6

NEWBORN PIGLETS:

At 24 hours: The colostrum production in the mammary gland also _______.

Answer 6

decreases

Question 7

If it is delayed in allowing the piglets to suckle, make sure that there is _____ of piglets to gain the maternal antibodies from foster moms

Answer 7

fostering

Question 8

When the offspring suckle the nipples (______), this
would send a sensory signal thru the spinal cord up to the hypothalamus

Answer 8

sukling reflex),

Question 9

produce and release oxytocin in the posterior pituitary gland via the
hypothalamo-hypophyseal tract

Answer 9

oxytocinergic neurons (PVN, SON)

Question 10

Oxytocin is
released in the posterior pituitary gland and would be released in the peripheral blood circulation and would bind into the oxytocin receptors in the ______ cells of the mammary gland.

Answer 10

myoepithelial cells

Question 11

cells surrounding the alveoli

Answer 11

myoepithelial cells

Question 12

when myoepithelial cells contract (due to oxytocin), it squeezes the milk from the alveoli out into the duct of the mammary gland results in →

Answer 12

milk ejection or
milk-let- down

Question 13

If the animal is stressed → results in the activation of the
________ or ______ sytem

→ leads to inhibition of milk ejection.

Answer 13

adrenergic or catecholaminergic system