Quiz Questions Part 1 Flashcards
What is the function of each type of bone cell?
Osteoblast: form bone
Osteocyte: maintain or nurture bone
Osteoclast: remodel bone
What are the bone cells embedded in?
An amorphous matrix consisting of ground substance, protein fibers and various minerals.
What is the primary constituent of the ground substance?
Glycosaminoglycans
What is the principle type of protein fiber found in bone?
Type 1 collagen
What is the most frequently described deposit in bone?
Hydroxyapatite
What is wolffs law as it pertains to bone?
Living tissue will respond to stressors
Bone is formed or absorbed in response to stress
What are the three main responses of bone to allow it to be described as “living”?
Heal
Remodel under stressors and
Age
What is bone the embryological derivative of?
Mesenchyme or cartilage
What is the name given to the pattern of ossification in mesenchyme?
Intramebranous ossification
What is the timing for appearance of intramembranous ossification?
From the second to the third month in utero
What bones are derived from intramembranous ossification?
Nasal, palatine, vomer, lacrimal, zygomatic, maxilla, frontal, parietal, most of the mandible and clavicle, squama of the temporal and occipital bones and the greater wing of the sphenoid.
What bones of the facial skeleton are formed by intramembranous ossification?
Nasal, palatine, vomer, lacrimal, maxilla and part of the mandible
What is the name given to the pattern of ossification in cartilage?
Endochondral ossification
What part of the skull is derived from endochondral ossification?
Chondrocranium
What skull bones ossify by both endochondral and intramembranous ossification?
Mandible, sphenoid, temporal and occipital bones
What is the name of the outer fibro-cellular covering on bone?
Periosteum
What are the four basic tissues of the human body?
Epithelium
Muscle
Neural tissue
Connective tissue
What are the six more commonly used classifications of normal bone?
Long bones, short bones, flat bones, irregular bones, paranasal sinus or pneumatic bones and sesamoid bones
What are the classifications given to abnormal bone stressed in Spinal Anatomy?
Heterotopic and accessory bone
What is the name given to bone formed in non-bone location?
Heterotopic bone
What is the primary characteristic of short bones?
They are essentially cuboidal
What are the examples of short bones?
Most of the bones of carpals and tarsals
What are examples of flat bones?
Parietal bone and sternum
What is the characteristic of pneumatic bone?
Air spaces within the bone
What are the examples of pneumatic bone?
Frontal, ethmoid, maxilla, sphenoid and temporal
What bones contain paranasal sinuses?
Frontal, ethmoid, maxilla and sphenoid
What is the characteristic of sesamoid bone?
The bone develops within a tendon
What are consistent examples of sesamoid bone?
Patella and pisiform
What are examples of heterotopic bone?
Calcific deposits in pineal gland, heart and ligaments
What are examples of accessory bone?
Para-articular processes and bony spurs of vertebrae
What are the four basic surface feature categories?
Elevations, depressions, tunnels or passageways and facets
What are the types of osseous elevations?
Linear, rounded and sharp
What are the types of osseous linear elevations?
The line, ridge and crest
What are the types of rounded osseous elevations?
Tubercle, protuberance, trochanter, tuber or tuberosity and malleolus
What is the definition of an osseous trochanter?
A large, blunt projection from the surface of bone with a significant base and height
What is the definition of and osseous malleolus?
A hammer-head likee elevation on the surface of bone
What are the categories of sharp osseous elevations?
Spine and process
What are the categories of osseous depressions?
Linear and rounded
What are the categories of osseous linear depressions?
Notch or incisure, groove and sulcus
What are the categories of rounded osseous depressions?
The fovea and fossa
What is the definition of an osseous fovea?
A shallow depression of variable circumference on the surface of bone.
What are the names given to openings on the surface of bone?
Ostium of orifice and hiatus
What is the definition of an osseous hiatus?
An irregular opening on the surface of bone
What are the names given to osseous ostia which completely penetrate bone?
Foramen or canal
What is the definition of an osseous foramen?
An ostium passing completely through a thin region of bone
What is the definition of an osseous canal?
An ostium passing completely through a thick region of bone
What is the name given to an ostium which does not completely penetrate through a region of bone but appears as a blind-ended passageway?
Meatus
What is the definition of an osseous fissure?
An irregular slit-like or crack-like appearance between the surfaces of adjacent bones
What are the categories of osseous facets?
Flat facets and rounded facets
What are the categories of rounded osseous facets?
Articular heads and articular condyles
What is the definition of an osseous condyle?
A knuckle-shaped surface on bone for osseous articulation
How many bones form the typical adult appendicular skeleton?
126 bones
How many bones form the typical adult axial skeleton?
80
What bones form the axial skeleton?
Skull, hyoid, vertebral column, sternum and ribs
What is the name given to the adult skull minus the mandible?
The cranium
What is the total number of bones forming the typical adult skull?
28 bones
How many bones form the typical adult neurocranium?
8 bones
What bones form the facial skeleton?
Mandible, vomer, nasal, maxilla, lacrimal, inferior nasal concha, palatine and zygomatic
How many bones form the facial skeleton (splanchnocranium or visceral skeleton)?
14
How many bones comprise the typical adult auditory ossicles?
6 bones
How many bones are present in the adult hyoid?
One bone
What is the number of bones comprising each region of the typical adult spinal column or vertebral column?
7 cervical, 12 thoracic, and 5 lumbar vertebrae, 1 sacrum and 1 coccyx
What is the name given to the presacral region of the typical adult vertebral column or spinal column?
The spine
What is the total number of bones forming the typical adult spine?
24 bones
What is the definition of “spine” as it pertains to the vertebral column?
The pre-sacral region of the vertebral column or spinal column
How many bones are present in the typical adult sternum?
1 bone
What regions are present along the typical adult sternum?
The manubrium sterni, the corpus sterni and the xiphoid process
How many ribs are present in the typical adult skeleton?
12 pair or 24 ribs
What is the number of vertebrae in a typical adolescent?
33 segments
What is the number of vertebrae in a typical adult?
26 segments
What is the number of vertebrae in the typical spine?
24 segments
What constitutes the spine?
24 presacral segments, the cervical, thoracic and lumbar vertebrae
How many segments unite to form the sacrum?
5 segments
How many segments unite to form the typical coccyx?
4 segments
Which mammals do not have seven cervical vertebrae?
The two toed sloth, manatee, ant bear, and three toed sloth
Which mammals have more than seven cervical vertebrae?
The ant bear and the three-toed sloth
Which mammals have less than seven cervical vertebrae?
The manatee and two-toed sloth
What does the term cervical refer to?
The region of the neck
What does the term “thoracic” refer to?
Breast plate or chest; it referred to the armor bearing region of the torso
What other term is often used to identify the vertebral segments of the chest?
The dorsal segments; the dorsals
What is the typical number of segments in the dorsal or thoracic region?
12 segments
What does the term “lumbar” refer to?
The loin; the region between the rib and the hip
What is the typical number of segments in the lumbar region?
5 segments
What does the term “sacrum” refer to?
The holy bone or holy region
What does the term “coccyx” refer to?
A cuckoo birds’ bill or cuckoo birds’ beak
What is the length of a typical male spinal column?
About 70 cm or 28 inches
What is the length of a typical female spinal column?
About 60 centimeters or 25 inches
What is the length difference between a typical male and typical female spinal column?
About 3 inches
What is the length of the male cervical region?
About 12 centimeters or 5 inches
What is the length of the male thoracic region?
About 28 centimeters or 11 inches