A 1-Week-Old Boy Is Brought to the Emergency Department with Poor

question 9

Multiple Choice

A 1-week-old boy is brought to the emergency department with poor feeding, lethargy, and unusual "muscle movements" involving the left thumb and hand over the last 2 days.  The patient's mother had appropriate prenatal care, a normal pregnancy, and took no medications other than prenatal vitamins.  The infant's vital signs are normal, but unusual flexion of the left wrist and thumb and extension of the fingers are observed with cuff blood pressure measurement.  Physical examination reveals a hypoplastic mandible, low-set ears, bifid uvula, and cleft palate.  A chest x-ray reveals decreased soft-tissue attenuation in the right anterior mediastinum.  These findings most likely suggest impaired development of which of the following embryonic structures?

• A)Anterior neuropore
• B)Foramen cecum
• C)Rathke pouch
• D)Second pharyngeal cleft
• E)Third pharyngeal pouch

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Definitions:

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the standard overhead estimated, based on the actual level of activity.

Variable Overhead Efficiency Variance

The difference between the actual variable overhead incurred and the standard variable overhead based on the actual level of activity, reflecting efficiency in using overhead resources.

Variable Overhead Efficiency Variance

The difference between the actual variable overhead costs incurred and the standard variable overhead costs, based on efficient use of resources.

Labor Rate Variance

The difference between the actual hourly wage paid to workers and the expected (or standard) wage rate, multiplied by the total hours worked.