,26/27 BIOL 121/BIOD 121 MODULE 6 EXAM |
NUTRITION -PORTAGE | Q&A + DETAILED
RATIONALES
1. A person planning pregnancy asks why nutrition before conception matters even before
pregnancy is confirmed. Which explanation is most appropriate?
A) Nutrient status before conception can influence reproductive health and very early
embryonic development
B) Nutritional status becomes relevant only after the second trimester
C) Preconception nutrition affects only maternal body weight
D) Nutrient stores cannot influence pregnancy outcomes
Correct Answer: Nutrient status before conception can influence reproductive health and
very early embryonic development
Rationale: Nutritional preparation begins before conception because early embryonic
development occurs before many people recognize that they are pregnant. Adequate
nutrient stores and an appropriate overall dietary pattern can support reproductive health,
implantation, placental development, and early fetal development. Folate is a particularly
important example because the neural tube develops very early in pregnancy.
2. Adequate folate status during the periconceptional period is especially important for
reducing the risk of:
A) gestational hypertension in every pregnancy
B) neural tube defects
C) childhood lactose intolerance
D) postpartum dehydration
Correct Answer: neural tube defects
Rationale: Folate is required for DNA synthesis and normal cell division. Adequate folate,
including recommended folic acid intake during the periconceptional period, substantially
reduces the risk of neural tube defects. Because neural tube closure occurs early, waiting
until late pregnancy to address folate intake misses the most critical developmental
window.
3. A person enters pregnancy with depleted iron stores. Why is this nutritionally
important?
A) Iron is required only after birth
B) Pregnancy eliminates the need for hemoglobin
C) Pregnancy increases iron demands associated with expansion of maternal red-cell
mass and fetal development
D) Iron becomes a source of dietary energy during pregnancy
,Correct Answer: Pregnancy increases iron demands associated with expansion of maternal
red-cell mass and fetal development
Rationale: Iron requirements increase substantially during pregnancy because maternal
blood volume and red-cell mass expand and iron is transferred to the developing fetus and
placenta. Beginning pregnancy with poor iron stores can therefore increase vulnerability to
iron deficiency.
4. Which statement best describes energy requirements during pregnancy?
A) Energy needs double immediately after conception
B) Energy requirements decrease throughout pregnancy
C) Pregnancy requires no additional nutritional consideration
D) Energy requirements generally increase, but “eating for two” does not mean
consuming twice the usual calories
Correct Answer: Energy requirements generally increase, but “eating for two” does not
mean consuming twice the usual calories
Rationale: Pregnancy requires additional energy to support maternal physiological
changes and fetal and placental growth, particularly as pregnancy progresses. However,
requirements do not double. Nutrient density is therefore especially important: the diet
must supply increased amounts of several nutrients without an unnecessary doubling of
total energy intake.
5. Why does protein become particularly important during pregnancy?
A) Amino acids support synthesis of maternal, placental, and fetal tissues
B) Protein becomes the only energy source available to the fetus
C) Protein replaces the need for folate
D) Amino acids directly form maternal calcium stores
Correct Answer: Amino acids support synthesis of maternal, placental, and fetal tissues
Rationale: Pregnancy involves substantial tissue synthesis. Dietary protein provides
essential and nonessential amino acids used to build fetal tissues, placenta, maternal blood
proteins, uterus, breast tissue, and other structures. Adequate total energy is also
important so that dietary protein can be used efficiently for these constructive functions.
6. Iodine requirements deserve particular attention during pregnancy because iodine is
required for:
A) collagen formation exclusively
B) thyroid hormone production supporting neurological growth and development
C) maternal glycogen storage only
D) intestinal calcium absorption
Correct Answer: thyroid hormone production supporting neurological growth and
development
, Rationale: Iodine is incorporated into thyroid hormones. During fetal development,
appropriate thyroid hormone availability is particularly important for normal brain and
nervous-system development. Severe iodine deficiency during pregnancy can therefore
have profound developmental consequences.
7. A pregnant person eliminates dairy foods without replacing their nutrients. Which
nutrient combination deserves particular attention?
A) Vitamin C and sodium
B) Vitamin K and fluoride
C) Calcium and vitamin D
D) Vitamin B12 and chloride exclusively
Correct Answer: Calcium and vitamin D
Rationale: Dairy products commonly contribute calcium and, when fortified, vitamin D.
Eliminating them does not necessarily produce deficiency, but nutritionally equivalent
alternatives should be incorporated. Calcium supports fetal skeletal mineralization and
maternal physiology, while vitamin D contributes to calcium absorption and regulation.
8. Why is alcohol avoidance emphasized during pregnancy?
A) Alcohol improves placental nutrient transfer
B) Small amounts guarantee normal development
C) The fetus rapidly metabolizes alcohol more efficiently than an adult
D) Prenatal alcohol exposure can disrupt development, and no universally safe
exposure threshold has been established
Correct Answer: Prenatal alcohol exposure can disrupt development, and no universally
safe exposure threshold has been established
Rationale: Alcohol crosses the placenta and can interfere with fetal growth and
neurological development. Prenatal exposure can produce fetal alcohol spectrum disorders.
Because a safe amount or timing of alcohol exposure during pregnancy has not been
established, avoidance is the preventive recommendation.
9. Appropriate gestational weight gain is important because:
A) both inadequate and excessive gain can be associated with adverse outcomes
B) every pregnant person should gain exactly the same amount
C) maternal weight gain consists entirely of fetal tissue
D) pregnancy weight gain has no relationship to pre-pregnancy status
Correct Answer: both inadequate and excessive gain can be associated with adverse
outcomes
Rationale: Appropriate gestational weight gain supports fetal growth, maternal tissue
expansion, blood-volume changes, and energy reserves. Recommended ranges differ
NUTRITION -PORTAGE | Q&A + DETAILED
RATIONALES
1. A person planning pregnancy asks why nutrition before conception matters even before
pregnancy is confirmed. Which explanation is most appropriate?
A) Nutrient status before conception can influence reproductive health and very early
embryonic development
B) Nutritional status becomes relevant only after the second trimester
C) Preconception nutrition affects only maternal body weight
D) Nutrient stores cannot influence pregnancy outcomes
Correct Answer: Nutrient status before conception can influence reproductive health and
very early embryonic development
Rationale: Nutritional preparation begins before conception because early embryonic
development occurs before many people recognize that they are pregnant. Adequate
nutrient stores and an appropriate overall dietary pattern can support reproductive health,
implantation, placental development, and early fetal development. Folate is a particularly
important example because the neural tube develops very early in pregnancy.
2. Adequate folate status during the periconceptional period is especially important for
reducing the risk of:
A) gestational hypertension in every pregnancy
B) neural tube defects
C) childhood lactose intolerance
D) postpartum dehydration
Correct Answer: neural tube defects
Rationale: Folate is required for DNA synthesis and normal cell division. Adequate folate,
including recommended folic acid intake during the periconceptional period, substantially
reduces the risk of neural tube defects. Because neural tube closure occurs early, waiting
until late pregnancy to address folate intake misses the most critical developmental
window.
3. A person enters pregnancy with depleted iron stores. Why is this nutritionally
important?
A) Iron is required only after birth
B) Pregnancy eliminates the need for hemoglobin
C) Pregnancy increases iron demands associated with expansion of maternal red-cell
mass and fetal development
D) Iron becomes a source of dietary energy during pregnancy
,Correct Answer: Pregnancy increases iron demands associated with expansion of maternal
red-cell mass and fetal development
Rationale: Iron requirements increase substantially during pregnancy because maternal
blood volume and red-cell mass expand and iron is transferred to the developing fetus and
placenta. Beginning pregnancy with poor iron stores can therefore increase vulnerability to
iron deficiency.
4. Which statement best describes energy requirements during pregnancy?
A) Energy needs double immediately after conception
B) Energy requirements decrease throughout pregnancy
C) Pregnancy requires no additional nutritional consideration
D) Energy requirements generally increase, but “eating for two” does not mean
consuming twice the usual calories
Correct Answer: Energy requirements generally increase, but “eating for two” does not
mean consuming twice the usual calories
Rationale: Pregnancy requires additional energy to support maternal physiological
changes and fetal and placental growth, particularly as pregnancy progresses. However,
requirements do not double. Nutrient density is therefore especially important: the diet
must supply increased amounts of several nutrients without an unnecessary doubling of
total energy intake.
5. Why does protein become particularly important during pregnancy?
A) Amino acids support synthesis of maternal, placental, and fetal tissues
B) Protein becomes the only energy source available to the fetus
C) Protein replaces the need for folate
D) Amino acids directly form maternal calcium stores
Correct Answer: Amino acids support synthesis of maternal, placental, and fetal tissues
Rationale: Pregnancy involves substantial tissue synthesis. Dietary protein provides
essential and nonessential amino acids used to build fetal tissues, placenta, maternal blood
proteins, uterus, breast tissue, and other structures. Adequate total energy is also
important so that dietary protein can be used efficiently for these constructive functions.
6. Iodine requirements deserve particular attention during pregnancy because iodine is
required for:
A) collagen formation exclusively
B) thyroid hormone production supporting neurological growth and development
C) maternal glycogen storage only
D) intestinal calcium absorption
Correct Answer: thyroid hormone production supporting neurological growth and
development
, Rationale: Iodine is incorporated into thyroid hormones. During fetal development,
appropriate thyroid hormone availability is particularly important for normal brain and
nervous-system development. Severe iodine deficiency during pregnancy can therefore
have profound developmental consequences.
7. A pregnant person eliminates dairy foods without replacing their nutrients. Which
nutrient combination deserves particular attention?
A) Vitamin C and sodium
B) Vitamin K and fluoride
C) Calcium and vitamin D
D) Vitamin B12 and chloride exclusively
Correct Answer: Calcium and vitamin D
Rationale: Dairy products commonly contribute calcium and, when fortified, vitamin D.
Eliminating them does not necessarily produce deficiency, but nutritionally equivalent
alternatives should be incorporated. Calcium supports fetal skeletal mineralization and
maternal physiology, while vitamin D contributes to calcium absorption and regulation.
8. Why is alcohol avoidance emphasized during pregnancy?
A) Alcohol improves placental nutrient transfer
B) Small amounts guarantee normal development
C) The fetus rapidly metabolizes alcohol more efficiently than an adult
D) Prenatal alcohol exposure can disrupt development, and no universally safe
exposure threshold has been established
Correct Answer: Prenatal alcohol exposure can disrupt development, and no universally
safe exposure threshold has been established
Rationale: Alcohol crosses the placenta and can interfere with fetal growth and
neurological development. Prenatal exposure can produce fetal alcohol spectrum disorders.
Because a safe amount or timing of alcohol exposure during pregnancy has not been
established, avoidance is the preventive recommendation.
9. Appropriate gestational weight gain is important because:
A) both inadequate and excessive gain can be associated with adverse outcomes
B) every pregnant person should gain exactly the same amount
C) maternal weight gain consists entirely of fetal tissue
D) pregnancy weight gain has no relationship to pre-pregnancy status
Correct Answer: both inadequate and excessive gain can be associated with adverse
outcomes
Rationale: Appropriate gestational weight gain supports fetal growth, maternal tissue
expansion, blood-volume changes, and energy reserves. Recommended ranges differ
