Pediatric Nutrition Practice Questions

Q: What is seen in the knee jerk reflex in scurvy?

May be normal initially, later decreases. **Explanation:** In **Scurvy (Vitamin C deficiency)**, the primary pathology involves defective collagen synthesis, leading to capillary fragility and subperiosteal hemorrhages. The changes in the knee jerk reflex are not due to primary neurological damage, but rather due to the **mechanical and painful complications** of the disease. 1. **Why Option D is correct:** Initially, the reflexes are normal because the nerves and muscles are intact. However, as the disease progresses, massive **subperiosteal hemorrhages** occur, particularly at the lower end of the femur and upper end of the tibia. This leads to intense pain and exquisite tenderness (pseudoparalysis). Additionally, intramuscular bleeds and subsequent fibrosis or disuse atrophy of the quadriceps muscle can occur. Consequently, the elicitation of the knee jerk becomes difficult or the response becomes **decreased/diminished** due to muscle weakness and the physical restriction caused by pain and hematomas. 2. **Why other options are incorrect:** * **Exaggerated (A):** This indicates an Upper Motor Neuron (UMN) lesion. Scurvy does not affect the pyramidal tracts. * **Decreased (B):** While reflexes do decrease, they are not decreased from the onset; the "initially normal" phase is a key clinical distinction. * **Increases later (C):** There is no physiological mechanism in Vitamin C deficiency that would lead to hyperreflexia. **Clinical Pearls for NEET-PG:** * **Earliest sign of Scurvy:** Follicular hyperkeratosis. * **Radiological signs:** Wimberger’s ring sign (epiphysis), Frankel’s line (white line of Frenkel), and Pelkan spur. * **Position:** "Frog-leg position" due to extreme pain on movement (pseudoparalysis). * **Gums:** Swollen, spongy, and bleeding gums (only seen if teeth have erupted).

Q: As compared to cow's milk, human milk has:

More iron. **Explanation:** The correct answer is **C. More iron**. While the absolute quantity of iron in cow's milk (0.5 mg/L) is slightly higher than in human milk (0.3 mg/L), the **bioavailability** of iron in human milk is significantly superior. Approximately **50% of iron in breast milk is absorbed**, compared to only 10% from cow's milk. This is due to the presence of high levels of Vitamin C and lactose in human milk, which facilitate absorption. **Analysis of Options:** * **A. More proteins:** Incorrect. Cow’s milk contains significantly more protein (~3.3g/dL) than human milk (~1.1g/dL). Furthermore, human milk is **whey-dominant** (60:40 ratio), making it easier to digest, whereas cow’s milk is **casein-dominant** (20:80 ratio), which forms hard curds in the infant's stomach. * **B. Less carbohydrates:** Incorrect. Human milk contains **more lactose** (7g/dL) compared to cow’s milk (4.5g/dL). Lactose provides energy and promotes the growth of *Lactobacillus bifidus*. * **D. Less of vitamins:** Incorrect. Human milk generally contains adequate vitamins (except Vitamin K and D) for the infant. Cow’s milk is notoriously deficient in Vitamin C and Vitamin E. **High-Yield Facts for NEET-PG:** 1. **Energy Content:** Both human and cow's milk provide approximately **67 kcal/100ml**. 2. **Minerals:** Cow’s milk has higher sodium, potassium, and calcium, which can lead to a high **renal solute load** in neonates. 3. **Protective Factors:** Human milk contains **IgA, Lysozyme, and Lactoferrin** (which sequesters iron to inhibit bacterial growth), which are absent in cow's milk. 4. **Fat:** Human milk contains more **essential fatty acids** and lipase, aiding better fat digestion.

Q: All are causes of infantile tremor syndrome EXCEPT:

Vitamin B1 deficiency. **Explanation:** **Infantile Tremor Syndrome (ITS)** is a clinical disorder characterized by a classic tetrad of symptoms: **tremors, anemia, pigmentary skin changes, and regression of mental development.** It is primarily seen in infants aged 6 to 24 months who are exclusively breastfed by malnourished, vegetarian mothers. **Why Vitamin B1 deficiency is the correct answer:** The primary nutritional etiology of ITS is **Vitamin B12 (Cobalamin) deficiency**, not Vitamin B1 (Thiamine). Vitamin B12 is essential for myelin synthesis and DNA maturation; its deficiency leads to the characteristic neurological symptoms and megaloblastic anemia seen in ITS. Vitamin B1 deficiency causes Beriberi, which presents differently (congestive heart failure or peripheral neuropathy). **Analysis of other options:** * **Malnutrition:** This is the foundational risk factor. Most affected infants have Protein-Energy Malnutrition (PEM) and are born to mothers with poor nutritional status. * **Magnesium deficiency:** Hypomagnesemia has been documented in several cases of ITS and is thought to contribute to the irritability and tremors observed in these infants. * **Infections:** Acute infections (respiratory or gastrointestinal) often act as a "trigger" that precipitates the onset of tremors in a nutritionally vulnerable child. **NEET-PG High-Yield Pearls:** * **Classic Triad:** Tremors, skin hyperpigmentation (knuckle pigmentation), and mental regression. * **The "Plump Baby" Appearance:** Infants often appear well-nourished or "chubby" due to edema, despite underlying malnutrition. * **Hematology:** Peripheral smear typically shows **Megaloblastic Anemia**. * **Treatment:** Vitamin B12 supplementation is the mainstay of therapy. Tremors may transiently worsen after starting treatment (phenobarbital can be used for control).

Q: Which of the following factors does NOT reduce breast milk production?

Auditory stimulus of the baby. **Explanation:** Breast milk production and ejection are governed by two primary neuroendocrine reflexes: the **Prolactin reflex** (milk production) and the **Oxytocin reflex** (milk ejection/let-down). **Why Option A is correct:** The **Auditory stimulus** (hearing the baby cry), visual stimulus (looking at the baby), or even thinking about the baby triggers the **Oxytocin reflex**. Oxytocin causes the contraction of myoepithelial cells around the alveoli, leading to milk let-down. Unlike stress or pain, which can inhibit this reflex, positive sensory stimuli from the infant actually **facilitate** milk flow and do not reduce production. **Why the other options are incorrect:** * **B. Use of pacifiers:** This leads to "nipple confusion" and reduces the time the infant spends at the breast. Decreased suckling leads to reduced prolactin secretion, subsequently lowering milk supply. * **C. Formula feeding:** This is the most common cause of secondary milk insufficiency. Supplementation reduces the infant's hunger and frequency of breastfeeding, leading to breast engorgement and feedback inhibition of lactation (FIL). * **D. Absence of night feeding:** Prolactin levels are naturally higher at night. Skipping night feeds reduces the overall prolactin surge and decreases the total daily milk volume. **NEET-PG High-Yield Pearls:** * **Prolactin:** Responsible for milk **synthesis** (secreted by Anterior Pituitary). It is stimulated by nipple suckling. * **Oxytocin:** Responsible for milk **ejection** (secreted by Posterior Pituitary). It is highly sensitive to maternal emotions. * **Lactational Amenorrhea:** Exclusive breastfeeding provides 98% protection against pregnancy for the first 6 months, provided the mother remains amenorrheic. * **Galactogogues:** Drugs like Metoclopramide and Domperidone can increase milk production by antagonizing dopamine (which normally inhibits prolactin).

Q: Compared with cow's milk, what component does mother's milk have more of?

Lactose. **Explanation:** The composition of human milk is uniquely adapted to meet the nutritional and developmental needs of a growing infant. **1. Why Lactose is the Correct Answer:** Human milk contains significantly more **Lactose** (approx. 7 g/dL) compared to cow’s milk (approx. 4.5 g/dL). Lactose is the primary carbohydrate in breast milk; it provides essential energy for the rapidly developing brain and promotes the growth of *Lactobacillus bifidus* in the gut, which maintains an acidic environment to inhibit pathogens. **2. Why the Other Options are Incorrect:** * **Proteins:** Cow’s milk contains about **three times more protein** (3.3 g/dL) than human milk (1.1 g/dL). Specifically, cow’s milk is high in casein, which forms hard, indigestible curds, whereas human milk is rich in whey protein (lactalbumin), which is easily digested. * **Vitamin D:** Both human and cow’s milk are **notoriously low** in Vitamin D. However, cow’s milk generally contains slightly higher amounts than unfortified breast milk. This is why Vitamin D supplementation (400 IU/day) is recommended for all breastfed infants. * **Fat:** The total fat content is roughly **similar** in both (approx. 3.5–4 g/dL). However, the *quality* differs; human milk is richer in essential fatty acids and contains **lipase**, which aids in fat digestion—an enzyme absent in cow’s milk. **High-Yield Clinical Pearls for NEET-PG:** * **Iron:** Both milks are low in iron, but the **bioavailability** of iron in breast milk is much higher (50-70%) compared to cow’s milk (10%). * **Minerals:** Cow’s milk has a much higher mineral content (Sodium, Potassium, Calcium), leading to a high **Renal Solute Load**, which can dehydrate an infant’s immature kidneys. * **Immunological Factors:** Human milk contains IgA, lactoferrin, and lysozymes, which are absent in cow’s milk.

Q: What is the best marker for chronic protein-energy malnutrition?

Height for age. **Explanation:** In pediatric nutrition, anthropometric indices are used to differentiate between different types and durations of malnutrition. **1. Why Height for Age is Correct:** Height for age is the primary indicator of **linear growth**. When a child suffers from chronic, long-term protein-energy malnutrition (PEM), the body prioritizes survival over bone elongation, leading to **stunting**. Stunting (low height for age) reflects the cumulative effect of long-term nutritional deficiencies and recurrent infections. It is considered the best marker for **chronic malnutrition**. **2. Analysis of Incorrect Options:** * **Weight for Age:** This is a composite index that reflects both past (chronic) and present (acute) malnutrition. While it is the simplest to measure and is used in **Growth Charts (ICDS)** to monitor underweight children, it cannot distinguish between a child who is short and a child who is thin. * **Weight for Height:** This is the best indicator of **acute malnutrition** or "wasting." It reflects recent weight loss or failure to gain weight due to acute illness or starvation. It is independent of age. * **Head Circumference:** This primarily reflects brain growth and is generally preserved until malnutrition becomes extremely severe. It is not a sensitive marker for general nutritional status. **High-Yield Clinical Pearls for NEET-PG:** * **Stunting:** Low Height for Age (Chronic Malnutrition). * **Wasting:** Low Weight for Height (Acute Malnutrition). * **Underweight:** Low Weight for Age (Composite indicator). * **Waterlow’s Classification:** Uses Weight/Height for wasting and Height/Age for stunting. * **Best indicator of recovery from malnutrition:** Weight for height (improvement in wasting occurs before stunting is reversed).

Q: A term, otherwise well neonate was found to have a total serum bilirubin of 17 mg/dl. He was admitted in NICU and started on treatment. All of the following can be adverse effects of the treatment administered EXCEPT?

Hypercalcemia. **Explanation:** The neonate in the clinical scenario has significant hyperbilirubinemia (17 mg/dl) and is being treated with **Phototherapy**, which is the standard of care. The question asks for the exception among the adverse effects of phototherapy. **Why Hypercalcemia is the Correct Answer:** Phototherapy actually causes **Hypocalcemia**, not hypercalcemia. The mechanism involves the suppression of melatonin secretion by the pineal gland due to light exposure. Melatonin normally inhibits cortisol-induced bone resorption; its suppression leads to increased calcium uptake by bones, resulting in a drop in serum calcium levels. **Analysis of Incorrect Options:** * **Bronze Baby Syndrome:** Occurs in neonates with conjugated hyperbilirubinemia. When exposed to phototherapy, the photo-isomers of copper porphyrins accumulate, giving the skin a grayish-brown discoloration. * **Dehydration:** Phototherapy increases **Insensible Water Loss (IWL)** through the skin and stool. This can lead to dehydration if fluid intake is not adjusted. * **Retinal Toxicity:** High-intensity blue light can cause irreversible damage to the retina. This is why eyes must be shielded with opaque patches during treatment. **High-Yield Clinical Pearls for NEET-PG:** * **Wavelength:** The most effective light is in the **blue-green spectrum (460–490 nm)**. * **Mechanism:** Phototherapy works via **structural isomerization** (lumirubin formation - irreversible), **photo-isomerization** (reversible), and **photo-oxidation**. * **Gonadal Protection:** Genitals should be covered to prevent potential damage from heat/light. * **Contraindication:** Phototherapy is contraindicated in **congenital erythropoietic porphyria** (causes severe blistering and photosensitivity).

Q: A 6-month-old child presented with diarrhea for a few days and dermatitic lesions on the hands and feet. Scalp hair was comparatively sparse. Deficiency of zinc was suspected. What is true about acrodermatitis enteropathica?

Autosomal recessive inheritance. **Explanation:** **Acrodermatitis Enteropathica (AE)** is a rare genetic disorder characterized by a severe deficiency of zinc. **1. Why Option A is correct:** AE is inherited as an **autosomal recessive** trait. It is caused by a mutation in the **SLC39A4 gene** located on chromosome 8q24.3. This gene encodes the **ZIP4 transporter protein**, which is essential for the active transport of zinc across the apical membrane of enterocytes in the duodenum and jejunum. Without functional ZIP4, dietary zinc cannot be absorbed efficiently. **2. Why other options are incorrect:** * **Option B:** The inheritance pattern is strictly recessive, not dominant. * **Option C:** AE is not "partially" cured; it is **completely reversible** with high-dose oral zinc supplementation. Clinical improvement in mood and appetite often occurs within 24–48 hours of starting treatment. * **Option D:** While the genetic defect is lifelong, the term "requires lifelong treatment" is often debated in the context of *acquired* zinc deficiency. However, in the context of this specific question, the primary focus is the **inheritance pattern**, which is a classic "high-yield" fact for AE. (Note: While patients do need ongoing zinc, the hallmark of the disease in exams is its genetic transmission). **Clinical Pearls for NEET-PG:** * **Classic Triad:** Dermatitis (periorificial and acral), Alopecia, and Diarrhea. * **Timing:** Symptoms typically appear shortly after **weaning** from breast milk to cow's milk (breast milk contains a zinc-binding ligand that aids absorption, which is absent in cow's milk). * **Lesions:** Characteristically vesiculobullous and eczematous, located around the mouth, anus, and on the hands/feet. * **Diagnosis:** Low serum zinc levels and low **alkaline phosphatase** (a zinc-dependent enzyme).

Q: What is the recommended daily protein intake for an infant aged 0-6 months?

1 gm/kg/day. ### Explanation **Correct Option: B (1 gm/kg/day)** The recommended dietary allowance (RDA) for protein in infants aged 0–6 months is approximately **1.05 gm/kg/day** (rounded to 1 gm/kg/day in standard textbooks and recent ICMR-NIN guidelines). During the first six months of life, infants experience the most rapid rate of growth and development. Breast milk, which contains roughly 1.1 gm of protein per 100 ml, is the gold standard source that perfectly meets this requirement while maintaining a safe solute load for the immature neonatal kidneys. **Analysis of Incorrect Options:** * **Option A (0.5 gm/kg/day):** This is significantly below the requirement for any pediatric age group. Such low intake would lead to growth failure and Protein-Energy Malnutrition (PEM). * **Option C (1.5 gm/kg/day):** This value is closer to the requirements for infants aged 6–12 months or those recovering from illness/malnutrition. For a healthy 0–6 month infant, 1.5 gm/kg is higher than the physiological baseline. * **Option D (2 gm/kg/day):** This is excessive for a healthy term infant. High protein intake in early infancy increases the **Renal Solute Load (RSL)**, which can lead to dehydration and hypernatremia, as infant kidneys have limited concentrating capacity. **High-Yield Clinical Pearls for NEET-PG:** * **Protein Source:** Whey-to-casein ratio in early breast milk is **80:20**, transitioning to **60:40** in mature milk, making it easily digestible compared to cow’s milk (20:80). * **Energy Requirement:** The calorie requirement for 0–6 months is approximately **92 kcal/kg/day** (ICMR 2020). * **Catch-up Growth:** In cases of Severe Acute Malnutrition (SAM), protein requirements may increase to **3–4 gm/kg/day** during the rehabilitation phase. * **Reference:** Always follow the latest **ICMR-NIN (National Institute of Nutrition)** guidelines for nutrition-related questions in Indian exams.

Question 1

What is seen in the knee jerk reflex in scurvy?

Accepted Answer

May be normal initially, later decreases

Answer

Exaggerated

Answer

Decreased

Answer

May be normal initially, later increases

Question 2

As compared to cow's milk, human milk has:

Accepted Answer

More iron

Answer

More proteins

Answer

Less carbohydrates

Answer

Less of vitamins

Question 3

All are causes of infantile tremor syndrome EXCEPT:

Accepted Answer

Vitamin B1 deficiency

Answer

Malnutrition

Answer

Magnesium deficiency

Answer

Infections

Question 4

Which of the following factors does NOT reduce breast milk production?

Accepted Answer

Auditory stimulus of the baby

Answer

Use of pacifiers

Answer

Formula feeding supplementation

Answer

Absence of night feeding

Question 5

Compared with cow's milk, what component does mother's milk have more of?

Accepted Answer

Lactose

Answer

Vitamin D

Answer

Proteins

Answer

Fat

Question 6

What is the best marker for chronic protein-energy malnutrition?

Accepted Answer

Height for age

Answer

Weight for age

Answer

Weight for height

Answer

Head circumference

Question 7

A 1-year-old child presents with muscle wasting, loss of subcutaneous fat, no signs of edema, and weight below 60% of WHO standard. The mother reports not providing sufficient proteins and other nutrients to the child after six months of age. What is the likely diagnosis?

Accepted Answer

Marasmus

Answer

Kwashiorkor

Answer

Marasmus & Kwashiorkor

Answer

Undernutrition

Question 8

A term, otherwise well neonate was found to have a total serum bilirubin of 17 mg/dl. He was admitted in NICU and started on treatment. All of the following can be adverse effects of the treatment administered EXCEPT?

Accepted Answer

Hypercalcemia

Answer

Bronze baby syndrome

Answer

Dehydration

Answer

Retinal toxicity

Question 9

A 6-month-old child presented with diarrhea for a few days and dermatitic lesions on the hands and feet. Scalp hair was comparatively sparse. Deficiency of zinc was suspected. What is true about acrodermatitis enteropathica?

Accepted Answer

Autosomal recessive inheritance

Answer

Autosomal dominant inheritance

Answer

Partially cured by zinc treatment

Answer

Requires lifelong treatment

Question 10

What is the recommended daily protein intake for an infant aged 0-6 months?

Accepted Answer

1 gm/kg/day

Answer

0.5 gm/kg/day

Answer

1.5 gm/kg/day

Answer

2 gm/kg/day

Pediatric Nutrition — MCQs

Pediatric Nutrition — MCQs

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