MSC ORT Exam 1 UPDATED ACTUAL
Exam Questions and CORRECT Answers
The knee is the articulation between what - CORRECT ANSWER - The femur, the tibia
and the patella
long bones - CORRECT ANSWER - femur, tibia, humerus, ulna and radius
Cortical(compact bone) - CORRECT ANSWER - 80% of the skeleton
Cancellous bone - CORRECT ANSWER - spongy or trabecular, crossed lattice structure-
end of long bones
Subchondral - CORRECT ANSWER - dense bone beneath articular cartilage
Diaphysis - CORRECT ANSWER - shaft of the long bones- consists of thick cortical bone
shell surrounding medullary canal
Epiphysis - CORRECT ANSWER - end of long bones where it flares, the growth plate of
the bone
Once epiphysis is closed, it is all called - CORRECT ANSWER - metaphysis
What are the fibrous connective tissue - CORRECT ANSWER - it is tendon and ligament
What is the main building block for tendons, ligaments, skin, teeth, bone - CORRECT
ANSWER - collagen
Collagen is the - CORRECT ANSWER - building block fibers
,protein fibers
twisted protein fibers
What produces collagen fibers - CORRECT ANSWER - fibroblasts
What is essential to musculoskeletal tissues - CORRECT ANSWER - collagen
Elastin - CORRECT ANSWER - functions in connective tissue with collagen
coils of protein that stretches
important in function of ligaments and tendons
provides tissue elasticity
Ligament composition - CORRECT ANSWER - water (60-80%)
type 1 collagen (70% of dry weight)
less organized collagen fibers than tendons
elastin fibers
low vascularity
low cellularity (population of cells)- fibroblasts
When are tendons and ligaments weakest after injury - CORRECT ANSWER - between
days 5-21
Tendons transfer forces from - CORRECT ANSWER - muscle to bone producing joint
motion
Tendon Composition and Structure - CORRECT ANSWER - Water (60-80%)
Type 1 collagen- 85% (dry weight)
Type 3 collagen- around 5%
, Proteoglycans make up 0-5%
fibroblasts re the predominant cells
structure combination of bundles of fibers
Tendons contain more __________ and less _________ than ligaments - CORRECT
ANSWER - collagen, elastin
Tendons are (stronger/weaker) than ligaments but (more/less) elastic than ligaments -
CORRECT ANSWER - stronger, less
Articular Cartilage Function - CORRECT ANSWER - interface of bones forming joints
decreases friction
decreases loads
provides smooth articulation
Articular Cartilage Composition - CORRECT ANSWER - Water- 65-80%
Collagen- 90% type 2
Higher level of proteoglycans
cells- chondrocytes
Articular Cartilage continued - CORRECT ANSWER - can withstands compressive forces
from millions of steps
slick- more slick than ice skate on ice
1/4 to 3/8 inches thicks
avascular
neural
synovial fluid provides nutrition
Exam Questions and CORRECT Answers
The knee is the articulation between what - CORRECT ANSWER - The femur, the tibia
and the patella
long bones - CORRECT ANSWER - femur, tibia, humerus, ulna and radius
Cortical(compact bone) - CORRECT ANSWER - 80% of the skeleton
Cancellous bone - CORRECT ANSWER - spongy or trabecular, crossed lattice structure-
end of long bones
Subchondral - CORRECT ANSWER - dense bone beneath articular cartilage
Diaphysis - CORRECT ANSWER - shaft of the long bones- consists of thick cortical bone
shell surrounding medullary canal
Epiphysis - CORRECT ANSWER - end of long bones where it flares, the growth plate of
the bone
Once epiphysis is closed, it is all called - CORRECT ANSWER - metaphysis
What are the fibrous connective tissue - CORRECT ANSWER - it is tendon and ligament
What is the main building block for tendons, ligaments, skin, teeth, bone - CORRECT
ANSWER - collagen
Collagen is the - CORRECT ANSWER - building block fibers
,protein fibers
twisted protein fibers
What produces collagen fibers - CORRECT ANSWER - fibroblasts
What is essential to musculoskeletal tissues - CORRECT ANSWER - collagen
Elastin - CORRECT ANSWER - functions in connective tissue with collagen
coils of protein that stretches
important in function of ligaments and tendons
provides tissue elasticity
Ligament composition - CORRECT ANSWER - water (60-80%)
type 1 collagen (70% of dry weight)
less organized collagen fibers than tendons
elastin fibers
low vascularity
low cellularity (population of cells)- fibroblasts
When are tendons and ligaments weakest after injury - CORRECT ANSWER - between
days 5-21
Tendons transfer forces from - CORRECT ANSWER - muscle to bone producing joint
motion
Tendon Composition and Structure - CORRECT ANSWER - Water (60-80%)
Type 1 collagen- 85% (dry weight)
Type 3 collagen- around 5%
, Proteoglycans make up 0-5%
fibroblasts re the predominant cells
structure combination of bundles of fibers
Tendons contain more __________ and less _________ than ligaments - CORRECT
ANSWER - collagen, elastin
Tendons are (stronger/weaker) than ligaments but (more/less) elastic than ligaments -
CORRECT ANSWER - stronger, less
Articular Cartilage Function - CORRECT ANSWER - interface of bones forming joints
decreases friction
decreases loads
provides smooth articulation
Articular Cartilage Composition - CORRECT ANSWER - Water- 65-80%
Collagen- 90% type 2
Higher level of proteoglycans
cells- chondrocytes
Articular Cartilage continued - CORRECT ANSWER - can withstands compressive forces
from millions of steps
slick- more slick than ice skate on ice
1/4 to 3/8 inches thicks
avascular
neural
synovial fluid provides nutrition
