Jamp Embryology: Chapter 12

Front 1

Region of the somite that will form muscle:

Back 1

Myotome

Front 2

Tissue that can form fibroblasts, chondroblasts, or osteobasts:

Back 2

Mesenchyme

Front 3

Membranous bones derive directly from this tissue:

Back 3

Mesenchyme

Front 4

This tissue is derived from neural crest:

Back 4

Ectomesenchyme

Front 5

Somite region contributing to appendicular skeleton:

Back 5

Sclerotome

Front 6

The interzone mesenchyme develops into dense fibrous tissue in the:

Back 6

Cranial sutures

Front 7

The notochord persists to form the:

Back 7

Nucleus pulposus

Front 8

A bifid xiphoid process in some infants reflects development from:

Back 8

Paired sternal bars

Front 9

Sphenoid bone:

Back 9

Cartilaginous neurocranium

Front 10

Calvarium:

Back 10

Membranous neurocranium

Front 11

Ethmoid bone:

Back 11

Cartilaginous neurocranium

Front 12

Malleus:

Back 12

Cartilaginous viscerocranium

Front 13

Maxillary bone:

Back 13

Membranous viscerocranium

Front 14

Secondary ossification centers appear in limb bones at which time?

Back 14

Two years after birth

Front 15

During limb bud development, which area induces the mesenchyme to grow and differentiate along the limb axis?

Back 15

Apical epidermal ridge

Front 16

A child has multiple contracted joints, with deviated hands and elbows, clenched fists, and club feet. Diagnosis?

Back 16

Arthrogyrposis

Front 17

A newborn keeps his head tilted to one side, and a mass is noted on one sternocleidomastoid muscle. Diagnosis?

Back 17

Torticollis

Front 18

A 7 y.o. boy from Mexico has a severe limp and pain in his hip. Radiographs disclose a devormed acetabulum on the right with increased distance between the acetabular rim and femoral head. Diagnosis?

Back 18

Congenital dislocation of the hip

Front 19

A newborn has a prominent forehead, shallow nasal bridge, short proximal segments of the arms and legs, curved spine, and bilateral club feet. His birth length measures below the third centile but his birth weight is in the normal range. Diagnosis?

Back 19

Skeletal dysplasia

Front 20

A newborn has an asymmetric chest with one nipple higher than the other. He has syndactyly of digits 2 and 3 on the right. Diagnosis?

Back 20

Poland anomaly

Front 21

A newborn has a ventricular septal defect, multiple certebral anomalies with severe curvature of the spine (scoliosis), absence of the radius bilaterally (radial aplasia), and a normal facial appearance. A mass is felt on the right side of the abdomen. The mass is most likely due to:

Back 21

Hydronephrosis