10.2 Milk Ejection

Question 1

The process of how the signals are transmitted from suckling of the nipple via (2)

Answer 1

1) spinal cord
2) hypothalamus

Question 2

primary stimulus of milk ejection

Answer 2

suckling of offsprings

Question 3

other stimulus of milk ejection (2)

Answer 3

hand milking & milk machine

Question 4

Procedure performed before attaching of milk machine teat-cups:
○ Cleaning & drying the teats
○ Massaging the teats & udder

1. Stimulate receptors in the teats
2. Activates milk ejection reflex

Answer 4

Prestimulation of Teat

Question 5

shorter milking time
higher milk flow
more efficient milk removal

Answer 5

Prestimulation of Teat

Question 6

When the teats are pre-stimulated prior to milking, the secretion of ______ is sharply increasing; and high levels are maintained during the course of milking

Answer 6

oxytocin

Question 7

Compared with the lactating animal without
pre-stimulation of teat, oxytocin increase is _____.

The milk flow is also erratic – starts quite low, it tips and increases but is quite longer compared with those of prestimulation of teat.

Answer 7

gradual

Question 8

With the offspring continuously suckling the teat during nursing or lactation period, these signals sent to hypothalamus would inhibit ______ _____ which is a prolactin-inhibiting hormone.

Answer 8

dopamine secretion

Question 9

dopamine secretion ensure that the anterior pituitary gland would increase and continuously release _____

Answer 9

prolactin

Question 10

prolactin binding to prolactin receptors in the ____ of the mammary gland

→ continuous production of milk.

Answer 10

alveolar cells

Question 11

stops when the offspring
are weaned

Answer 11

Milk production or Lactogenesis