The Ultimate ALPP CLC Exam 1 Study
Guide: Practice Questions with
Rationales for 2025/2026
Q1: The hormone primarily responsible for milk ejection (let-down) is:
A) Prolactin
B) Estrogen
C) Oxytocin
D) Progesterone
Answer: C) Oxytocin
Rationale: Oxytocin is released from the posterior pituitary in response to
nipple stimulation, infant suckling, and maternal psychological state (e.g.,
hearing baby cry). Oxytocin causes myoepithelial cells surrounding the
alveoli to contract, propelling milk through the ductal system toward the
nipple. Prolactin is responsible for milk synthesis, not ejection. Estrogen and
progesterone support breast development during pregnancy but inhibit
milk production and must decrease for Lactogenesis II to occur .
Q2: During which stage of lactogenesis does copious milk secretion
begin?
A) Lactogenesis I
B) Lactogenesis II
,C) Lactogenesis III
D) Galactopoiesis
Answer: B) Lactogenesis II
Rationale: Lactogenesis II is the stage when copious milk secretion begins,
typically occurring 30-72 hours postpartum. This stage is triggered by the
withdrawal of progesterone following delivery of the placenta, allowing
prolactin to stimulate milk production. Lactogenesis I occurs during mid-
pregnancy with the production of colostrum. Lactogenesis III
(galactopoiesis) involves maintenance of established milk production.
Delayed onset of Lactogenesis II (>72 hours) can occur in primiparas,
following cesarean section, or in mothers with diabetes or retained
placental fragments .
Q3: Prolactin is produced by which structure?
A) Hypothalamus
B) Posterior pituitary
C) Anterior pituitary
D) Placenta
Answer: C) Anterior pituitary
Rationale: Prolactin is synthesized and secreted by the anterior pituitary
gland. It is the primary hormone responsible for milk synthesis
(lactogenesis). Prolactin levels rise during pregnancy and surge after birth.
Prolactin levels are highest during nighttime sleep, which is why nighttime
feedings are important for establishing and maintaining milk supply .
,Q4: Which of the following best describes the composition of
colostrum compared to mature milk?
A) Lower protein, higher fat
B) Higher protein, lower fat, higher immunoglobulins
C) Higher lactose, lower immunoglobulins
D) Similar composition but lower volume
Answer: B) Higher protein, lower fat, higher immunoglobulins
Rationale: Colostrum (produced during Lactogenesis I) has a higher
protein content, particularly secretory immunoglobulin A (SIgA), lactoferrin,
and other immune factors, compared to mature milk. It is lower in fat and
lactose than mature milk. Colostrum provides passive immunity and has a
mild laxative effect to aid in meconium passage. Mature milk has higher fat
and lactose content to meet the growing infant's energy needs. Colostrum
is produced in small volumes (approximately 2-20 mL per feeding) that are
appropriate for the newborn's stomach capacity .
Q5: The let-down reflex can be inhibited by:
A) Nipple stimulation
B) Pain, stress, and anxiety
C) Infant suckling
D) Prolactin release
Answer: B) Pain, stress, and anxiety
Rationale: The let-down reflex can be inhibited by pain, stress, anxiety,
embarrassment, or fatigue. These factors stimulate the sympathetic nervous
system, which releases adrenaline and inhibits oxytocin release. Nipple
stimulation and infant suckling promote let-down. Some mothers do not
, perceive let-down sensation, and this is normal. The absence of perceived
let-down does not indicate inadequate milk production or transfer .
Q6: What is the approximate caloric content of human milk?
A) 10 kcal/oz
B) 20 kcal/oz (approximately 65-70 kcal/100 mL)
C) 50 kcal/oz
D) 100 kcal/100 mL
Answer: B) 20 kcal/oz (approximately 65-70 kcal/100 mL)
Rationale: Human milk averages approximately 65-70 kcal/100 mL, which
is roughly 19-21 kcal/ounce. Mature milk has higher fat and lactose content
compared to colostrum. The fat content increases as the feed progresses
(hindmilk). Understanding the caloric content of breast milk is essential for
assessing infant growth and ensuring adequate nutrition .
Q7: The "breast crawl" refers to:
A) A developmental milestone
B) The infant's ability to move toward the breast and self-attach
C) A breastfeeding position
D) A maternal reflex
Answer: B) The infant's ability to move toward the breast and self-
attach
Rationale: The "breast crawl" describes the newborn's instinctive ability,
when placed skin-to-skin on the mother's abdomen, to crawl toward the
Guide: Practice Questions with
Rationales for 2025/2026
Q1: The hormone primarily responsible for milk ejection (let-down) is:
A) Prolactin
B) Estrogen
C) Oxytocin
D) Progesterone
Answer: C) Oxytocin
Rationale: Oxytocin is released from the posterior pituitary in response to
nipple stimulation, infant suckling, and maternal psychological state (e.g.,
hearing baby cry). Oxytocin causes myoepithelial cells surrounding the
alveoli to contract, propelling milk through the ductal system toward the
nipple. Prolactin is responsible for milk synthesis, not ejection. Estrogen and
progesterone support breast development during pregnancy but inhibit
milk production and must decrease for Lactogenesis II to occur .
Q2: During which stage of lactogenesis does copious milk secretion
begin?
A) Lactogenesis I
B) Lactogenesis II
,C) Lactogenesis III
D) Galactopoiesis
Answer: B) Lactogenesis II
Rationale: Lactogenesis II is the stage when copious milk secretion begins,
typically occurring 30-72 hours postpartum. This stage is triggered by the
withdrawal of progesterone following delivery of the placenta, allowing
prolactin to stimulate milk production. Lactogenesis I occurs during mid-
pregnancy with the production of colostrum. Lactogenesis III
(galactopoiesis) involves maintenance of established milk production.
Delayed onset of Lactogenesis II (>72 hours) can occur in primiparas,
following cesarean section, or in mothers with diabetes or retained
placental fragments .
Q3: Prolactin is produced by which structure?
A) Hypothalamus
B) Posterior pituitary
C) Anterior pituitary
D) Placenta
Answer: C) Anterior pituitary
Rationale: Prolactin is synthesized and secreted by the anterior pituitary
gland. It is the primary hormone responsible for milk synthesis
(lactogenesis). Prolactin levels rise during pregnancy and surge after birth.
Prolactin levels are highest during nighttime sleep, which is why nighttime
feedings are important for establishing and maintaining milk supply .
,Q4: Which of the following best describes the composition of
colostrum compared to mature milk?
A) Lower protein, higher fat
B) Higher protein, lower fat, higher immunoglobulins
C) Higher lactose, lower immunoglobulins
D) Similar composition but lower volume
Answer: B) Higher protein, lower fat, higher immunoglobulins
Rationale: Colostrum (produced during Lactogenesis I) has a higher
protein content, particularly secretory immunoglobulin A (SIgA), lactoferrin,
and other immune factors, compared to mature milk. It is lower in fat and
lactose than mature milk. Colostrum provides passive immunity and has a
mild laxative effect to aid in meconium passage. Mature milk has higher fat
and lactose content to meet the growing infant's energy needs. Colostrum
is produced in small volumes (approximately 2-20 mL per feeding) that are
appropriate for the newborn's stomach capacity .
Q5: The let-down reflex can be inhibited by:
A) Nipple stimulation
B) Pain, stress, and anxiety
C) Infant suckling
D) Prolactin release
Answer: B) Pain, stress, and anxiety
Rationale: The let-down reflex can be inhibited by pain, stress, anxiety,
embarrassment, or fatigue. These factors stimulate the sympathetic nervous
system, which releases adrenaline and inhibits oxytocin release. Nipple
stimulation and infant suckling promote let-down. Some mothers do not
, perceive let-down sensation, and this is normal. The absence of perceived
let-down does not indicate inadequate milk production or transfer .
Q6: What is the approximate caloric content of human milk?
A) 10 kcal/oz
B) 20 kcal/oz (approximately 65-70 kcal/100 mL)
C) 50 kcal/oz
D) 100 kcal/100 mL
Answer: B) 20 kcal/oz (approximately 65-70 kcal/100 mL)
Rationale: Human milk averages approximately 65-70 kcal/100 mL, which
is roughly 19-21 kcal/ounce. Mature milk has higher fat and lactose content
compared to colostrum. The fat content increases as the feed progresses
(hindmilk). Understanding the caloric content of breast milk is essential for
assessing infant growth and ensuring adequate nutrition .
Q7: The "breast crawl" refers to:
A) A developmental milestone
B) The infant's ability to move toward the breast and self-attach
C) A breastfeeding position
D) A maternal reflex
Answer: B) The infant's ability to move toward the breast and self-
attach
Rationale: The "breast crawl" describes the newborn's instinctive ability,
when placed skin-to-skin on the mother's abdomen, to crawl toward the
