NU551 Unit 9 EXAM
QUESTIONS AND ANSWERS
Appendicular Skeleton - CORRECT ANSWER✅✅consists of 126 bones that make up
the upper and lower extremities, the shoulder girdle (pectoral girdle), and the pelvic
girdle (os coxae)
Axial Skeleton - CORRECT ANSWER✅✅consists of 80 bones that make up the skull,
vertebral column, and thorax
Bone Composition - CORRECT ANSWER✅✅Phosphate, Hydroxyapatite,
Hydroxyapatite is made up of calcium and phosphorus.
Bone Growth Location - CORRECT ANSWER✅✅Growth plate, in the metaphysis.
Causes of Metaphyseal Fracture in Children - CORRECT ANSWER✅✅Falls, Sports
injuries, Child abuse.
COL1A1 - CORRECT ANSWER✅✅Located on chromosome 17
COL1A2 - CORRECT ANSWER✅✅Located on chromosome 7
Comminuted Fracture - CORRECT ANSWER✅✅a bone breaks into more than two
fragments
Compact Bone - CORRECT ANSWER✅✅highly organized, solid, and extremely
strong; basic structural unit in compact bone is the haversian system
Complete Fracture - CORRECT ANSWER✅✅the bone is broken entirely
Components of the Haversian System - CORRECT ANSWER✅✅A central canal
(haversian canal), Concentric layers of bone matrix (lamellae), Tiny spaces (lacunae)
between the lamellae, Bone cells (osteocytes), Small channels or canals (canaliculi)
Delayed Union - CORRECT ANSWER✅✅union that does not occur until approximately
8 to 9 months after a fracture
Developmental dysplasia of the hip risk factors - CORRECT ANSWER✅✅Family
history, Breech birth, First born child
Diaphysis - CORRECT ANSWER✅✅narrow tubular midportion of a long bone
, Dislocation - CORRECT ANSWER✅✅the displacement of one or more bones in a joint
in which the opposing joint surfaces entirely lose contact with one another
Epiphysis - CORRECT ANSWER✅✅broad end of a long bone
Fatigue Fracture - CORRECT ANSWER✅✅caused by repetitive, sometimes abnormal
stress or torque applied to a bone
Forms of Muscular Dystrophy - CORRECT ANSWER✅✅Duchenne muscular
dystrophy (DMD): The most common and severe form, typically affecting young boys;
Becker muscular dystrophy (BMD): Like DMD but less severe and with a later onset;
Myotonic dystrophy (DM): Characterized by muscle stiffness and weakness, as well as
other symptoms such as cataracts and heart problems; Facioscapulohumeral muscular
dystrophy (FSHD): Affects the muscles of the face, shoulders, and upper arms.
Genu varum vs genu valgum - CORRECT ANSWER✅✅Both types of angular
deformities of the knee
Giant cell tumors epidemiology - CORRECT ANSWER✅✅Relatively rare, primarily
affecting young adults between the ages of 20 and 40, typically in tibia or femur
Gompysis - CORRECT ANSWER✅✅Joint from tooth to jaw; specific.
Haversian System - CORRECT ANSWER✅✅The basic structural unit in compact bone
Incomplete Fracture - CORRECT ANSWER✅✅the bone is damaged but is still in one
piece
Lacunae - CORRECT ANSWER✅✅Space between lamellae
Lamellae - CORRECT ANSWER✅✅Concentric layers of bone matrix
Least Progressive Muscular Dystrophy - CORRECT ANSWER✅✅Becker muscular
dystrophy (BMD) is the least progressive.
Legg-Calve-Perthes Disease manifestations - CORRECT ANSWER✅✅Characterized
by the death of the epiphysis of the femoral head and degeneration of the head of the
femur, followed by regeneration or recalcification
Linear Fracture - CORRECT ANSWER✅✅runs parallel to the long axis of the bone
Malunion - CORRECT ANSWER✅✅healing of a bone in an incorrect anatomic position
QUESTIONS AND ANSWERS
Appendicular Skeleton - CORRECT ANSWER✅✅consists of 126 bones that make up
the upper and lower extremities, the shoulder girdle (pectoral girdle), and the pelvic
girdle (os coxae)
Axial Skeleton - CORRECT ANSWER✅✅consists of 80 bones that make up the skull,
vertebral column, and thorax
Bone Composition - CORRECT ANSWER✅✅Phosphate, Hydroxyapatite,
Hydroxyapatite is made up of calcium and phosphorus.
Bone Growth Location - CORRECT ANSWER✅✅Growth plate, in the metaphysis.
Causes of Metaphyseal Fracture in Children - CORRECT ANSWER✅✅Falls, Sports
injuries, Child abuse.
COL1A1 - CORRECT ANSWER✅✅Located on chromosome 17
COL1A2 - CORRECT ANSWER✅✅Located on chromosome 7
Comminuted Fracture - CORRECT ANSWER✅✅a bone breaks into more than two
fragments
Compact Bone - CORRECT ANSWER✅✅highly organized, solid, and extremely
strong; basic structural unit in compact bone is the haversian system
Complete Fracture - CORRECT ANSWER✅✅the bone is broken entirely
Components of the Haversian System - CORRECT ANSWER✅✅A central canal
(haversian canal), Concentric layers of bone matrix (lamellae), Tiny spaces (lacunae)
between the lamellae, Bone cells (osteocytes), Small channels or canals (canaliculi)
Delayed Union - CORRECT ANSWER✅✅union that does not occur until approximately
8 to 9 months after a fracture
Developmental dysplasia of the hip risk factors - CORRECT ANSWER✅✅Family
history, Breech birth, First born child
Diaphysis - CORRECT ANSWER✅✅narrow tubular midportion of a long bone
, Dislocation - CORRECT ANSWER✅✅the displacement of one or more bones in a joint
in which the opposing joint surfaces entirely lose contact with one another
Epiphysis - CORRECT ANSWER✅✅broad end of a long bone
Fatigue Fracture - CORRECT ANSWER✅✅caused by repetitive, sometimes abnormal
stress or torque applied to a bone
Forms of Muscular Dystrophy - CORRECT ANSWER✅✅Duchenne muscular
dystrophy (DMD): The most common and severe form, typically affecting young boys;
Becker muscular dystrophy (BMD): Like DMD but less severe and with a later onset;
Myotonic dystrophy (DM): Characterized by muscle stiffness and weakness, as well as
other symptoms such as cataracts and heart problems; Facioscapulohumeral muscular
dystrophy (FSHD): Affects the muscles of the face, shoulders, and upper arms.
Genu varum vs genu valgum - CORRECT ANSWER✅✅Both types of angular
deformities of the knee
Giant cell tumors epidemiology - CORRECT ANSWER✅✅Relatively rare, primarily
affecting young adults between the ages of 20 and 40, typically in tibia or femur
Gompysis - CORRECT ANSWER✅✅Joint from tooth to jaw; specific.
Haversian System - CORRECT ANSWER✅✅The basic structural unit in compact bone
Incomplete Fracture - CORRECT ANSWER✅✅the bone is damaged but is still in one
piece
Lacunae - CORRECT ANSWER✅✅Space between lamellae
Lamellae - CORRECT ANSWER✅✅Concentric layers of bone matrix
Least Progressive Muscular Dystrophy - CORRECT ANSWER✅✅Becker muscular
dystrophy (BMD) is the least progressive.
Legg-Calve-Perthes Disease manifestations - CORRECT ANSWER✅✅Characterized
by the death of the epiphysis of the femoral head and degeneration of the head of the
femur, followed by regeneration or recalcification
Linear Fracture - CORRECT ANSWER✅✅runs parallel to the long axis of the bone
Malunion - CORRECT ANSWER✅✅healing of a bone in an incorrect anatomic position
