Musculoskeletal System Overview for NPTE Exam 2025-2026
What is the most abundant protein in the body? - correct answer Collagen
What are the characteristics of Type 1 Collagen? - correct answer Thick, stiff fibers with high
tensile strength; found in ligaments, tendons, joint capsules, and fascia.
What is the function of Type 2 Collagen? - correct answer Provides structural framework for
complex tissues and organs; found in hyaline cartilage and fibrocartilage.
What are elastin fibers known for? - correct answer High extensibility and the ability to return
to previous shape after deformation; found in hyaline cartilage and some spinal ligaments.
What is Dense Irregular Connective Tissue characterized by? - correct answer High density of
Type 1 collagen fibers oriented in multiple directions, providing tensile strength in multiple
directions; contributes to joint stability.
What is the healing rate of Dense Irregular Connective Tissue? - correct answer Limited blood
supply and low water content lead to a slower healing rate.
What is the primary function of Dense Regular Connective Tissue? - correct answer Provides
high tensile strength when stress is applied in the same direction as fiber orientation; found in
ligaments and tendons.
How does Dense Regular Connective Tissue contribute to joint stability? - correct answer
Ligamentous tension restricts excessive movement at a joint.
What are the main functions of Articular Cartilage? - correct answer Reduces friction, disperses
compressive loads, and is firmly anchored to underlying bone.
What type of collagen is found in Articular Cartilage? - correct answer Type 2 collagen, arranged
to provide structure and stability.
What is unique about the vascularization of Articular Cartilage? - correct answer It is avascular
and aneural, meaning it has no blood vessels or nerves.
What is the role of Fibrocartilage in joints? - correct answer Absorbs and dispenses forces in
multiple planes, mechanically stabilizes joints, and guides arthrokinematics.
Why does Fibrocartilage have limited healing potential? - correct answer It is largely avascular
and aneural due to the lack of perichondrium.
What are the two basic layers of bone? - correct answer Compact (cortical) bone and spongy
(cancellous) bone.
,What is the Haversian system? - correct answer It houses osteocytes and allows for
vascularization and innervation of bone.
What is the function of the periosteum? - correct answer Surrounds the outer cortical bone,
providing a blood supply and containing pressure and pain receptors.
What does Wolff's law state about bone? - correct answer Bone remodels according to external
forces placed upon it.
What stimulates the remodeling of bone? - correct answer Weight-bearing activities.
What maintains the homeostatic state of bones? - correct answer A balance between
osteoblasts (bone-forming cells) and osteoclasts (bone-resorbing cells).
What is a motor unit? - correct answer A single motor neuron and all the muscle fibers it
innervates.
What is the functional unit of muscle? - correct answer The sarcomere, which is aligned end to
end within individual muscle fibers.
What is the role of muscle in the musculoskeletal system? - correct answer Provides movement
through contraction of thousands of grouped muscle fibers.
What are the two main types of collagen and their characteristics? - correct answer Type 1
Collagen: Thick, stiff fibers with high tensile strength found in ligaments, tendons, joint
capsules, and fascia. Type 2 Collagen: Thinner fibers with less tensile strength, providing
structural framework for complex tissues and organs, found in hyaline cartilage and
fibrocartilage.
What are elastin fibers and where are they found? - correct answer Elastin fibers are protein
fibers high in extensibility that allow tissues to deform and return to their original shape. They
are found in hyaline cartilage and some spinal ligaments (e.g., Ligamentum Flavum).
What is the primary characteristic of dense irregular connective tissue? - correct answer It has a
high density of Type 1 collagen fibers oriented in multiple directions, providing tensile strength
in multiple directions.
What is the healing rate of dense irregular connective tissue and why? - correct answer It has a
limited blood supply and low water content, leading to a slower healing rate.
Where is dense irregular connective tissue found? - correct answer Within the joint capsule,
periosteum, aponeurosis, and dermis.
What defines dense regular connective tissue? - correct answer It has a high density of Type 1
collagen fibers oriented parallel to each other, providing high tensile strength when stress is
applied in the same direction as fiber orientation.
,Where is dense regular connective tissue found? - correct answer In ligaments and tendons.
What are the functions of articular cartilage? - correct answer It reduces friction, disperses
compressive loads, and is firmly anchored to underlying bone.
What type of cartilage is articular cartilage and what are its characteristics? - correct answer It
is specialized hyaline cartilage, avascular, and aneural, with no perichondrium.
What is fibrocartilage composed of and what is its function? - correct answer It contains plenty
of Type 1 collagen fibers in a multidirectional arrangement, absorbing and dispensing forces in
multiple planes, mechanically stabilizing joints.
What is the healing potential of fibrocartilage? - correct answer It is limited due to being largely
avascular and aneural.
Where is fibrocartilage found? - correct answer In labra, menisci, triangular fibrocartilage
complex, and intervertebral, temporomandibular, and pubic symphysis discs.
What is Wolff's law? - correct answer It states that bone remodels according to external forces
placed upon it.
What are the two types of collagen and their characteristics? - correct answer Type 1 Collagen:
Thick, stiff fibers with high tensile strength found in ligaments, tendons, joint capsules, and
fascia. Type 2 Collagen: Thinner fibers with less tensile strength, providing structural framework
for complex tissues and organs, found in hyaline cartilage and fibrocartilage.
What are elastin fibers and their function? - correct answer Elastin fibers are protein fibers that
are high in extensibility, allowing tissues to deform and return to their original shape. They are
found in hyaline cartilage and some spinal ligaments (e.g., Ligamentum Flavum).
What is Dense Irregular Connective Tissue and its properties? - correct answer It has a high
density of Type 1 collagen fibers and low elastin content, providing high tensile strength in
multiple directions. It has limited blood supply and low water content, leading to slower healing
rates, and contributes to joint stability.
What is the difference between Dense Regular and Dense Irregular Connective Tissue? - correct
answer Dense Regular Connective Tissue has collagen fibers oriented parallel to each other,
providing high tensile strength in one direction, while Dense Irregular Connective Tissue has
fibers oriented in multiple directions.
What is the function of articular cartilage? - correct answer Articular cartilage reduces friction,
disperses compressive loads, and is firmly anchored to underlying bone. It is specialized hyaline
cartilage that is avascular and aneural.
, What is fibrocartilage and its role in joints? - correct answer Fibrocartilage contains plenty of
Type 1 collagen fibers arranged multidirectionally, absorbing and dispensing forces in multiple
planes, mechanically stabilizing joints, and guiding arthrokinematics.
What is the structure of bone? - correct answer Bone provides rigid support and allows
movement, composed of compact (cortical) bone and spongy (cancellous) bone, which stores
marrow.
What is the periosteum and its function? - correct answer The periosteum is connective tissue
that surrounds the outer cortical bone, providing a blood supply and housing pressure and pain
receptors.
What is the role of osteoblasts and osteoclasts in bone health? - correct answer Osteoblasts
build bone, while osteoclasts break down bone, maintaining the homeostatic state of bones.
What is a motor unit in muscle physiology? - correct answer A motor unit consists of a single
motor neuron and all the muscle fibers it innervates.
What is a sarcomere? - correct answer The sarcomere is the functional unit of muscle, aligned
end to end within individual muscle fibers, containing thin actin protein filaments.
Where is articular cartilage found? - correct answer Articular cartilage is found on load-bearing
aspects of joint surfaces.
What contributes to joint stability in Dense Regular Connective Tissue? - correct answer
Ligamentous tension restricts excessive movement at a joint.
What is the significance of the Haversian system in bone? - correct answer The Haversian
system houses osteocytes and allows for vascularization and innervation of bone.
What happens to bone during weight-bearing activities? - correct answer Weight-bearing
activities stimulate the remodeling of bone.
What is the composition of dense regular connective tissue? - correct answer It has a high
density of Type 1 collagen fibers and low elastin content, providing high tensile strength and
low extensibility.
What is the role of synovial fluid in cartilage nutrition? - correct answer In synovial joints,
nutrients are diffused by synovial fluid, while in cartilaginous joints, nutrients diffuse across
endplates of surrounding trabecular bone.
What is the primary function of collagen in the musculoskeletal system? - correct answer
Collagen provides structural support and tensile strength to various tissues, including ligaments,
tendons, and cartilage.
What are the characteristics of articular cartilage? - correct answer Articular cartilage is
avascular, aneural, and reduces friction while dispersing compressive loads.
What is the most abundant protein in the body? - correct answer Collagen
What are the characteristics of Type 1 Collagen? - correct answer Thick, stiff fibers with high
tensile strength; found in ligaments, tendons, joint capsules, and fascia.
What is the function of Type 2 Collagen? - correct answer Provides structural framework for
complex tissues and organs; found in hyaline cartilage and fibrocartilage.
What are elastin fibers known for? - correct answer High extensibility and the ability to return
to previous shape after deformation; found in hyaline cartilage and some spinal ligaments.
What is Dense Irregular Connective Tissue characterized by? - correct answer High density of
Type 1 collagen fibers oriented in multiple directions, providing tensile strength in multiple
directions; contributes to joint stability.
What is the healing rate of Dense Irregular Connective Tissue? - correct answer Limited blood
supply and low water content lead to a slower healing rate.
What is the primary function of Dense Regular Connective Tissue? - correct answer Provides
high tensile strength when stress is applied in the same direction as fiber orientation; found in
ligaments and tendons.
How does Dense Regular Connective Tissue contribute to joint stability? - correct answer
Ligamentous tension restricts excessive movement at a joint.
What are the main functions of Articular Cartilage? - correct answer Reduces friction, disperses
compressive loads, and is firmly anchored to underlying bone.
What type of collagen is found in Articular Cartilage? - correct answer Type 2 collagen, arranged
to provide structure and stability.
What is unique about the vascularization of Articular Cartilage? - correct answer It is avascular
and aneural, meaning it has no blood vessels or nerves.
What is the role of Fibrocartilage in joints? - correct answer Absorbs and dispenses forces in
multiple planes, mechanically stabilizes joints, and guides arthrokinematics.
Why does Fibrocartilage have limited healing potential? - correct answer It is largely avascular
and aneural due to the lack of perichondrium.
What are the two basic layers of bone? - correct answer Compact (cortical) bone and spongy
(cancellous) bone.
,What is the Haversian system? - correct answer It houses osteocytes and allows for
vascularization and innervation of bone.
What is the function of the periosteum? - correct answer Surrounds the outer cortical bone,
providing a blood supply and containing pressure and pain receptors.
What does Wolff's law state about bone? - correct answer Bone remodels according to external
forces placed upon it.
What stimulates the remodeling of bone? - correct answer Weight-bearing activities.
What maintains the homeostatic state of bones? - correct answer A balance between
osteoblasts (bone-forming cells) and osteoclasts (bone-resorbing cells).
What is a motor unit? - correct answer A single motor neuron and all the muscle fibers it
innervates.
What is the functional unit of muscle? - correct answer The sarcomere, which is aligned end to
end within individual muscle fibers.
What is the role of muscle in the musculoskeletal system? - correct answer Provides movement
through contraction of thousands of grouped muscle fibers.
What are the two main types of collagen and their characteristics? - correct answer Type 1
Collagen: Thick, stiff fibers with high tensile strength found in ligaments, tendons, joint
capsules, and fascia. Type 2 Collagen: Thinner fibers with less tensile strength, providing
structural framework for complex tissues and organs, found in hyaline cartilage and
fibrocartilage.
What are elastin fibers and where are they found? - correct answer Elastin fibers are protein
fibers high in extensibility that allow tissues to deform and return to their original shape. They
are found in hyaline cartilage and some spinal ligaments (e.g., Ligamentum Flavum).
What is the primary characteristic of dense irregular connective tissue? - correct answer It has a
high density of Type 1 collagen fibers oriented in multiple directions, providing tensile strength
in multiple directions.
What is the healing rate of dense irregular connective tissue and why? - correct answer It has a
limited blood supply and low water content, leading to a slower healing rate.
Where is dense irregular connective tissue found? - correct answer Within the joint capsule,
periosteum, aponeurosis, and dermis.
What defines dense regular connective tissue? - correct answer It has a high density of Type 1
collagen fibers oriented parallel to each other, providing high tensile strength when stress is
applied in the same direction as fiber orientation.
,Where is dense regular connective tissue found? - correct answer In ligaments and tendons.
What are the functions of articular cartilage? - correct answer It reduces friction, disperses
compressive loads, and is firmly anchored to underlying bone.
What type of cartilage is articular cartilage and what are its characteristics? - correct answer It
is specialized hyaline cartilage, avascular, and aneural, with no perichondrium.
What is fibrocartilage composed of and what is its function? - correct answer It contains plenty
of Type 1 collagen fibers in a multidirectional arrangement, absorbing and dispensing forces in
multiple planes, mechanically stabilizing joints.
What is the healing potential of fibrocartilage? - correct answer It is limited due to being largely
avascular and aneural.
Where is fibrocartilage found? - correct answer In labra, menisci, triangular fibrocartilage
complex, and intervertebral, temporomandibular, and pubic symphysis discs.
What is Wolff's law? - correct answer It states that bone remodels according to external forces
placed upon it.
What are the two types of collagen and their characteristics? - correct answer Type 1 Collagen:
Thick, stiff fibers with high tensile strength found in ligaments, tendons, joint capsules, and
fascia. Type 2 Collagen: Thinner fibers with less tensile strength, providing structural framework
for complex tissues and organs, found in hyaline cartilage and fibrocartilage.
What are elastin fibers and their function? - correct answer Elastin fibers are protein fibers that
are high in extensibility, allowing tissues to deform and return to their original shape. They are
found in hyaline cartilage and some spinal ligaments (e.g., Ligamentum Flavum).
What is Dense Irregular Connective Tissue and its properties? - correct answer It has a high
density of Type 1 collagen fibers and low elastin content, providing high tensile strength in
multiple directions. It has limited blood supply and low water content, leading to slower healing
rates, and contributes to joint stability.
What is the difference between Dense Regular and Dense Irregular Connective Tissue? - correct
answer Dense Regular Connective Tissue has collagen fibers oriented parallel to each other,
providing high tensile strength in one direction, while Dense Irregular Connective Tissue has
fibers oriented in multiple directions.
What is the function of articular cartilage? - correct answer Articular cartilage reduces friction,
disperses compressive loads, and is firmly anchored to underlying bone. It is specialized hyaline
cartilage that is avascular and aneural.
, What is fibrocartilage and its role in joints? - correct answer Fibrocartilage contains plenty of
Type 1 collagen fibers arranged multidirectionally, absorbing and dispensing forces in multiple
planes, mechanically stabilizing joints, and guiding arthrokinematics.
What is the structure of bone? - correct answer Bone provides rigid support and allows
movement, composed of compact (cortical) bone and spongy (cancellous) bone, which stores
marrow.
What is the periosteum and its function? - correct answer The periosteum is connective tissue
that surrounds the outer cortical bone, providing a blood supply and housing pressure and pain
receptors.
What is the role of osteoblasts and osteoclasts in bone health? - correct answer Osteoblasts
build bone, while osteoclasts break down bone, maintaining the homeostatic state of bones.
What is a motor unit in muscle physiology? - correct answer A motor unit consists of a single
motor neuron and all the muscle fibers it innervates.
What is a sarcomere? - correct answer The sarcomere is the functional unit of muscle, aligned
end to end within individual muscle fibers, containing thin actin protein filaments.
Where is articular cartilage found? - correct answer Articular cartilage is found on load-bearing
aspects of joint surfaces.
What contributes to joint stability in Dense Regular Connective Tissue? - correct answer
Ligamentous tension restricts excessive movement at a joint.
What is the significance of the Haversian system in bone? - correct answer The Haversian
system houses osteocytes and allows for vascularization and innervation of bone.
What happens to bone during weight-bearing activities? - correct answer Weight-bearing
activities stimulate the remodeling of bone.
What is the composition of dense regular connective tissue? - correct answer It has a high
density of Type 1 collagen fibers and low elastin content, providing high tensile strength and
low extensibility.
What is the role of synovial fluid in cartilage nutrition? - correct answer In synovial joints,
nutrients are diffused by synovial fluid, while in cartilaginous joints, nutrients diffuse across
endplates of surrounding trabecular bone.
What is the primary function of collagen in the musculoskeletal system? - correct answer
Collagen provides structural support and tensile strength to various tissues, including ligaments,
tendons, and cartilage.
What are the characteristics of articular cartilage? - correct answer Articular cartilage is
avascular, aneural, and reduces friction while dispersing compressive loads.
