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1. When fusion of the left and right mandibular prominences isincomplete, ____________ may result.

   		cleft philtrum
   		cleft palate
   		cleft chin
   		cleft lip

2 points   

QUESTION 21

1. You are a physician for a 15-year-old boy. The patient has ahistory of tonsil infections and is visiting your office todaybecause he noticed mucus-like drainage collecting from adimple-like spot on the left side of his neck. Remembering yourembryology training, you examine the patient for a possible_______________ .

   		cervical vestige
   		cervical sinus
   		cervical fistula
   		cervical cyst

2 points   

QUESTION 22

1. Which of the following statements about circulation in a newbornbaby is FALSE?

   		The foramen ovale closes because pressure is greater on theright side of the heart
   		Anatomical closure of the shunts takes longer than functionalclosure
   		The ductus venosus closes due to lack of blood flow from theplacenta
   		The ductus arteriosus closes quickly after birth

2 points   

QUESTION 23

1. Which of the following migration movements must be disrupted toproduce a pelvic kidney?

   		cranial migration
   		lateral migration
   		caudal migration
   		medial migration

2 points   

QUESTION 24

1. An infant is born two weeks premature.  The infant hastrouble breathing normally immediately after birth. She takesshort, shallow breaths, gasps for air and her fingertips appearblue. After 1 week of intensive care, corticosteroid treatment, andproviding supplemental oxygen, she appears to have recoveredcompletely. She is breathing normally. These symptoms were mostlikely caused by ___________________ .

   		tracheoesophageal fistula
   		alveolar capillary dysplasia
   		pulmonary hypoplasia
   		respiratory distress syndrome

2 points   

QUESTION 25

1. An individual carries XY chromosomes, but cannot respond totestosterone due to a mutation in the testosterone receptor. Thisindividual will have ______________ .

   		normal testes
   		a normal uterus
   		normal ovaries
   		a normal p3nis