The phase of ejection of milk is called?

Appeared in: DSSSB - 28 August 2019 (Shift-1)

Explanation

Galactokinesis is the specific term for the ejection of milk from the mammary glands.
This process is also known as the milk let-down reflex.
It is triggered by the hormone oxytocin, which is released from the posterior pituitary gland in response to the infant's suckling.
Oxytocin causes the contraction of myoepithelial cells that surround the milk-producing alveoli, forcing the milk into the ducts and out through the nipple.

Option B: Lactogenesis refers to the initiation of milk synthesis and secretion by the alveolar cells of the breast, which occurs in the first few days after childbirth. It is about starting production, not ejection.
Option C: Mammogenesis is the process of breast growth and development, which prepares the mammary glands for lactation. This occurs primarily during puberty and pregnancy.
Option D: Galactopoiesis is the maintenance of established milk production. It ensures a continuous supply of milk as long as the infant continues to breastfeed.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Phases of Lactation as background academic context rather than a clinical decision trigger.
Understanding the difference between milk production (prolactin-driven) and milk ejection (oxytocin-driven) is vital for troubleshooting breastfeeding issues.
Nurses can educate new mothers that a tingling or pins-and-needles sensation in the breast can be a sign of the let-down reflex (Galactokinesis) occurring.
What if? A mother is experiencing significant stress and anxiety, and her baby is frustrated at the breast. The nurse should recognize that stress can inhibit oxytocin release, leading to poor galactokinesis. The intervention would be to create a calm, supportive environment, offer relaxation techniques, and ensure the mother is comfortable to facilitate the let-down reflex.

How to Approach the Question

First, identify the key term in the question stem, which is 'ejection of milk'.
This is a factual recall question that requires knowledge of the specific terminology related to lactation.
Mentally review the four main phases of lactation: Mammogenesis (growth), Lactogenesis (initiation), Galactopoiesis (maintenance), and Galactokinesis (ejection).
Differentiate the meaning of each option. 'Kinesis' implies movement or ejection.
Match the keyword 'ejection' with the correct term, 'Galactokinesis'.
Confirm that the other options relate to different aspects of lactation (development, initiation, and maintenance) and are therefore incorrect.

Concept Tested & Keywords

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E6 Physiology Essentials Sembulingam 10e Part 2 pp. 150-152, 30-32, 151-153

Practise the full DSSSB - 28 August 2019 (Shift-1)

Attempt every question from this paper in a timed mock, then review the full solution for each one.