Growth and Development — MCQs

Growth and Development Indian Medical PG Practice Questions and MCQs

Question 761: What is the average gain in height for children aged 2 to 6 years over a period of 4 years?

A. 25 cm (Correct Answer)
B. 75 cm
C. 100 cm
D. 50 cm

Explanation: ***25 cm*** - A child typically grows about **6-7 cm per year** between the ages of 2 and 6. Multiplying this by 4 years (from age 2 to 6) gives approximately 24-28 cm, making 25 cm the most accurate average gain. - This period is characterized by a **slower, more steady growth rate** compared to infancy or puberty. *75 cm* - This growth rate would mean an average of nearly 19 cm per year, which is significantly **higher than the typical growth rate** for children in this age range. - Such rapid growth is usually seen during **infancy** (0-1 year) or **adolescence** (puberty). *100 cm* - A 100 cm gain over 4 years translates to an average of 25 cm per year, representing an **unrealistically fast growth rate** for toddlers and preschoolers. - This magnitude of growth is not observed in any normal developmental period after the first year of life. *50 cm* - This implies an average growth of 12.5 cm per year, which is also **higher than the typical 6-7 cm per year** for children between 2 and 6 years. - While not as extreme as 75 cm or 100 cm, 50 cm is still an **overestimation** of average growth during this specific age interval.

Question 762: By the age of 7 months, infants are able to do all the following EXCEPT:

A. Transfer of object from hand to hand
B. Roll over
C. Cruises (Correct Answer)
D. Bounces actively

Explanation: ***Cruises*** - **Cruising** (walking while holding onto furniture) is typically observed around **9-12 months** of age, not at 7 months. - This skill requires more advanced balance and strength than what is generally developed by 7 months. *Transfer of object from hand to hand* - Infants are usually able to **transfer objects between hands** by **6-7 months** as fine motor skills develop. - This milestone indicates improving bilateral coordination and grasp. *Bounces actively* - Many 7-month-old infants can **bounce actively** when held in a standing position, demonstrating developing leg strength and gross motor control. - This is a precursor to later walking abilities. *Roll over* - Most infants master **rolling over** from back to front and vice versa between **4-7 months** of age. - This is a significant gross motor milestone indicating trunk control and strength.

Question 763: Maximum incidence of developmental defects is seen in:

A. Permanent incisors (adult teeth)
B. Primary incisors (deciduous teeth)
C. Primary mandibular second molar (deciduous teeth)
D. Permanent mandibular first molars (adult teeth) (Correct Answer)

Explanation: ***Permanent mandibular first molars (adult teeth)*** - The **permanent mandibular first molars** are the first permanent teeth to erupt, beginning around 6 years of age, and are thus exposed to the oral environment for the longest period. - Their early eruption and complex occlusal morphology (deep pits and fissures) make them highly susceptible to **developmental defects** such as hypoplasia, hypomineralization, and early carious lesions, leading to a high incidence of defects. *Primary incisors (deciduous teeth)* - While deciduous teeth can have developmental defects, their overall incidence is lower compared to permanent molars, and they are typically present for a shorter duration in the oral cavity. - **Nursing bottle caries** are common, but these are acquired carious lesions rather than primarily developmental defects. *Permanent incisors (adult teeth)* - Permanent incisors can exhibit developmental defects, especially due to trauma or systemic issues during their formation (e.g., **Turner's hypoplasia**). - However, their morphology is simpler and their position less prone to early destructive forces compared to the posterior molars, resulting in a lower overall incidence of developmental defects. *Primary mandibular second molar (deciduous teeth)* - Primary molars, like other deciduous teeth, are generally less prone to severe developmental defects compared to their permanent counterparts. - Their eruption time is later than primary incisors, and they are eventually exfoliated, limiting the long-term impact of any defects.

Question 764: The term "tracking" of blood pressure refers to

A. 24 hr BP monitoring
B. Pictorial representation of BP
C. BP control with nifedipine
D. Identifying children at risk of developing hypertension at a future date (Correct Answer)

Explanation: ***Identifying children at risk of developing hypertension at a future date*** - **"Tracking"** in the context of blood pressure refers to the concept that blood pressure tends to maintain its relative position within a population over time, from childhood into adulthood. - This allows for the identification of children with consistently higher blood pressure levels who are at increased risk of developing **frank hypertension** later in life. *24 hr BP monitoring* - This is a diagnostic tool used to measure blood pressure at regular intervals over a 24-hour period to assess typical fluctuations and identify conditions like **nocturnal hypertension** or **white-coat hypertension**. - It provides a comprehensive profile of an individual's blood pressure but does not refer to the long-term trend or prediction of future risk. *Pictorial representation of BP* - This refers to ways of visualizing blood pressure data, such as **graphs** or **charts**, which can aid in understanding trends or changes over time. - While useful for displaying tracking data, the term "tracking" itself denotes the underlying phenomenon of sustained relative blood pressure levels, not the method of display. *BP control with nifedipine* - **Nifedipine** is a calcium channel blocker used in the treatment of hypertension to **lower blood pressure**. - This option refers to a specific therapeutic intervention for blood pressure management, providing no insight into the concept of "tracking."

Question 765: What is typically the first type of consonantal sound produced by infants?

A. Sibilant
B. Bilabial (Correct Answer)
C. Fricative
D. Velar

Explanation: ***Bilabial*** - Infants typically produce **bilabial sounds** such as /p/, /b/, and /m/ as their first consonantal sounds. - This is due to the relative ease of articulation involving the **closure of both lips**. *Sibilant* - **Sibilant sounds** are a type of fricative, characterized by a hissing quality (e.g., /s/, /z/, /ʃ/). - These sounds are more complex to produce and generally develop later than bilabial sounds. *Fricative* - **Fricative sounds** involve a partial obstruction of the airflow, creating turbulent sound (e.g., /f/, /v/, /θ/). - The precise control of airflow required for fricatives is typically more challenging for infants than the simple lip closure of bilabial stops. *Velar* - **Velar sounds** are produced by the back of the tongue touching the soft palate (e.g., /k/, /g/). - While some velar sounds may appear relatively early, bilabials are generally established first due to simpler motor coordination.

Question 766: A normally growing child smiles back (social smile) at around what age?

A. 2-4 weeks
B. 4-6 weeks
C. 6-8 weeks (Correct Answer)
D. 8-10 weeks

Explanation: ***6-8 weeks*** - A **social smile** is a significant developmental milestone indicating emotional and social development, typically appearing around **2 months of age** (6-8 weeks). - It signifies the infant's ability to recognize and respond to human faces, fostering early parent-child bonding. *2-4 weeks* - At this age, infants typically exhibit **reflexive smiles**, which are not true social smiles as they do not respond to external stimuli. - Their primary focus is on basic physiological needs like feeding and sleeping. *4-6 weeks* - While infants may show some early signs of engagement, a consistent and clear **social smile** is usually not fully established yet. - They are more focused on tracking objects and showing early visual preferences. *8-10 weeks* - By this age, the **social smile** should already be well-established, as it typically appears by 6-8 weeks. - If a social smile has not appeared by 10 weeks, developmental assessment and monitoring for other milestones would be warranted.

Question 767: At what age does the anterior fontanelle typically close?

A. Before 3 months
B. At 12 months
C. Between 12 and 18 months (Correct Answer)
D. After 3 years

Explanation: ***Between 12 and 18 months*** - The anterior fontanelle typically closes between **12 and 18 months** of age, allowing for significant brain growth during infancy. - This timeframe is crucial for monitoring **head circumference growth** and detecting potential issues like microcephaly or hydrocephalus. *Before 3 months* - Closure of the anterior fontanelle before 3 months, or very early, can be a sign of **craniosynostosis**, requiring medical evaluation. - Most infants still have a palpable anterior fontanelle at this age. *At 12 months* - While some fontanelles may close around 12 months, the normal range extends further, up to 18 months. - A fontanelle still open at 12 months is generally considered normal. *After 3 years* - Delayed closure beyond 2 years or 3 years can indicate underlying conditions such as **hydrocephalus**, **rickets**, **hypothyroidism**, or other developmental disorders. - In such cases, further investigation is warranted.

Question 768: The most common presenting feature of bilateral congenital hip dislocation in children is:

A. Waddling (Correct Answer)
B. Knock knee
C. Antalgic
D. Stumbling

Explanation: ***Waddling*** - **Bilateral congenital hip dislocation** leads to an unstable gait where the body sways from side to side to maintain balance over the affected hip. - This characteristic gait is known as a **waddling gait** or **Trendelenburg gait**, making it the most common presenting feature when the child begins to walk. - Occurs due to bilateral hip instability causing the pelvis to tilt to the unsupported side during walking. *Stumbling* - **Stumbling** is generally associated with difficulties in coordination, muscle weakness, or neurological issues, rather than a primary presentation of hip dislocation. - It does not specifically describe the compensatory gait seen in bilateral congenital hip dislocation. *Knock knee* - **Knock knee** (genu valgum) is an angular deformity of the knees where they touch while the ankles are apart, which is unrelated to hip dislocation. - It is a lower limb alignment issue, distinct from hip joint instability. *Antalgic* - An **antalgic gait** is adopted to reduce pain in a limb or joint, often involving a shortened stance phase on the affected side. - While hip dislocation can cause pain, the specific and most common gait pattern in bilateral congenital hip dislocation is **waddling**, not merely an antalgic response. - Antalgic gait is more typical of unilateral painful conditions.

Question 769: At what age range do children typically demonstrate proficient self-feeding with a spoon and begin to dress themselves independently?

A. 2 to 3 years
B. 3 to 4 years (Correct Answer)
C. 4 to 5 years
D. 5 to 6 years

Explanation: ***3 to 4 years*** - At this age, children typically develop sufficient fine motor skills and cognitive understanding to **master self-feeding with a spoon** and manage basic dressing tasks. - They can often **put on simple clothing items** such as pants and shirts, though fastening buttons or zippers may still be challenging. *2 to 3 years* - Children at this age may start to attempt self-feeding and dressing, but their skills are still developing and they usually require significant **assistance and supervision**. - They might be able to use a spoon somewhat, but with considerable spilling, and can **take off some clothes** but struggle to put them on. *4 to 5 years* - By this age, most children have already **mastered self-feeding** and can dress independently with minimal help, often including fastening clothes. - This period focuses on refining these skills and tackling more complex dressing tasks like tying shoelaces. *5 to 6 years* - Children in this age range are typically fully independent in self-feeding and dressing, including more complex tasks like **tying shoelaces** and choosing appropriate clothing. - They are usually preparing for or already in early elementary school, where such independence is expected.

Question 770: At what age do newborns typically double their birth weight?

A. 3 months
B. 9 months
C. 12 months
D. By 6 months (Correct Answer)

Explanation: ***By 6 months*** - Infants typically **double their birth weight by 5 to 6 months of age** as a significant milestone in rapid early growth. - This rapid weight gain reflects adequate nutrition and healthy development in the first half-year of life. *3 months* - At 3 months, infants usually gain about **1 to 2 pounds per month**, but they have not yet doubled their birth weight. - Their weight gain is steady, but they are still some weeks away from this specific milestone. *9 months* - By 9 months, infants have usually **tripled their birth weight**, surpassing the doubling milestone. - This age marks further significant development, including increased mobility. *12 months* - At 12 months, infants typically have **tripled their birth weight**, which is a more advanced growth milestone than doubling. - This is often considered the end of infancy, with continued but slower growth rates expected.

Practice by Chapter

Normal Growth Parameters

Practice Questions

Developmental Milestones

Practice Questions

Puberty and Adolescent Development

Practice Questions

Growth Disorders

Practice Questions

Failure to Thrive

Practice Questions

Developmental Screening and Assessment

Practice Questions

Developmental Delays

Practice Questions

Growth Charts and Monitoring

Practice Questions

Short Stature

Practice Questions

Tall Stature

Practice Questions

Precocious and Delayed Puberty

Practice Questions

Psychosocial Development

Practice Questions

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