Kinesiology > Joint Study Guide > Flashcards

Joint Study Guide Flashcards

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1
Q

What is a joint?

A

A joint is the point of contact between two bones.

The specific structure of a joint determines its function.

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2
Q

What determines the function of a joint?

A

The specific structure of a joint dictates the type and range of movement it allows.

The relationship between structure and function is essential in understanding joint mechanics.

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3
Q

What is the primary function of cartilage in a joint?

A

The primary function of cartilage is to protect bones from friction where they meet at a joint.

Cartilage serves as a cushion and aids in smooth movement.

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4
Q

What are the two types of cartilage found in joints?

A
  • Hyaline cartilage (also known as articular cartilage)
  • Fibrocartilage

Each type of cartilage has unique properties and functions within joints.

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5
Q

What are ligaments?

A

Ligaments are tough, elastic bands of connective tissue that connect bones together.

They play a crucial role in joint stability.

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6
Q

What are the four main functions of ligaments regarding joints?

A
  • Stabilizing joints
  • Limiting movements
  • Strengthening joints
  • Preventing dislocations

These functions are essential for maintaining joint integrity and function.

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7
Q

What is the primary role of a bursa within the anatomy of a joint?

A

A bursa is a fluid-filled sac that acts as a cushion to reduce friction and tension between moving parts around joints.

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8
Q

What are menisci?

A

C-shaped pieces of cartilage in the knee that act as shock absorbers between the tibia and femur.

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9
Q

What are the three key functions of menisci in the knee?

A
  • Protect the lower leg from shock
  • Transmit weight from one bone to another
  • Provide stability to the knee
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10
Q

List the two primary systems for classifying joints.

A
  • Structural classification
  • Functional classification
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11
Q

What does structural classification of joints depend on?

A

Tissue composition (fibrous, cartilaginous, synovial)

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12
Q

What does functional classification of joints depend on?

A

Degree of movement allowed (synarthroses, amphiarthroses, diarthroses)

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13
Q

Compare and contrast syndesmosis, sutures, and gomphosis.

A
  • Syndesmosis: slightly movable (amphiarthrotic) joint with ligaments
  • Sutures: immovable (synarthrotic) joints in the cranium
  • Gomphosis: immovable joint (synarthrosis) for tooth articulation
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14
Q

What defines a primary cartilaginous joint (synchondrosis)?

A

A joint that connects bones with hyaline cartilage.

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15
Q

What type of cartilage is found in primary cartilaginous joints?

A

Hyaline cartilage

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16
Q

What are the key characteristics of synovial joints?

A
  • Freely moveable (diarthroses)
  • Contain articular cartilage, joint capsule, synovial fluid, synovial membrane, and ligaments
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17
Q

What are the three components of a lever system in the body?

A
  • Fulcrum
  • Resistance (load)
  • Force (effort)
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18
Q

In the human body, what serves as the fulcrum in a lever system?

A

Joints

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19
Q

Fill in the blank: A bursa reduces _______ and tension between moving parts around joints.

A

friction

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20
Q

True or False: Synovial joints are the least common type of joint in the body.

A

False

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21
Q

What is Syndesmosis?

A

A type of fibrous joint that is slightly movable (amphiarthrotic) and connects two bones with ligaments or a strong membrane.

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22
Q

Define Synovial Cavity

A

The fluid-filled space within a synovial joint, surrounded by a fibrous capsule.

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23
Q

What is Synovial Fluid?

A

A thick, viscous liquid found in synovial joints that lubricates and protects the ends of bones, provides nutrition, and seals the joint.

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24
Q

What type of joint is a Synovial Joint?

A

The most common type of joint; a freely moveable (diarthrosis) joint responsible for movement between long bones.

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25
What is a Synovial Membrane?
A thin layer of tissue lining the inside of some joints that produces the lubricating synovial fluid.
26
What are Tendons?
Fibrous tissues that connect muscles to bones and act as a mechanical bridge to transmit muscle forces.
27
What is a Third-class lever?
A lever where the force is applied between the fulcrum and the resistance. This is the most common type of lever in the body.
28
What are Amphiarthroses?
A joint that allows limited movement, providing a mix of stability and some motion.
29
What is Articular Cartilage?
Another term for the hyaline cartilage that covers the articulating surfaces of bones within a synovial joint.
30
Define Ball-and-socket joint.
A type of synovial joint capable of movement in any plane.
31
What is a Bursa?
A fluid-filled sac that acts as a cushion between bones and soft tissues or tendons to reduce friction.
32
What is a Cartilaginous Joint?
A structural classification for joints that are partially moveable (amphiarthrosis) and have fibrocartilage pads.
33
What are Diarthroses?
A functional classification for a joint that allows the most movement, permitting free motion in most directions.
34
What characterizes an Ellipsoid joint?
A type of synovial joint where an oval-shaped end of a bone articulates with an elliptical basin.
35
What is a Fibrous Joint?
A structural classification for joints that are immovable (synarthrosis) and are joined by fibrous connective tissue.
36
Define First-class lever.
A lever where the fulcrum is positioned between the force and the resistance.
37
What is a Fulcrum?
The fixed point around which a lever pivots.
38
What is a Gliding joint?
A type of synovial joint found between two flat surfaces that allows at least one movement.
39
What is a Gomphosis?
A type of fibrous joint that is an example of a synarthrosis (immovable).
40
What is a Hinge Joint?
A type of synovial joint that allows flexion and extension.
41
What is Hyaline Cartilage?
The specific type of cartilage that makes up articular cartilage in joints.
42
What is a Joint?
The point of contact between two bones.
43
What are Ligaments?
Tough, elastic bands of connective tissue that connect bones together.
44
What are Menisci?
C-shaped pieces of cartilage in the knee that act as shock absorbers.
45
What is a Pivot Joint?
A type of synovial joint that allows one bone to rotate around the surface of another bone.
46
What is a Saddle joint?
A type of synovial joint with convex and concave articulating surfaces.
47
Define Second-class lever.
A lever where the resistance is between the fulcrum and the point of force application.
48
What are Sutures?
A type of fibrous joint that immovably joins the bones of the skull.
49
What is a Symphysis?
A type of secondary cartilaginous joint connected by fibrocartilage that is lightly movable.
50
What are Synarthroses?
A functional classification for a joint that does not move under normal conditions.
51
What is Synchondrosis?
A primary cartilaginous joint connected by hyaline cartilage.
52
What are the three structural classifications of joints?
Fibrous, Cartilaginous, Synovial ## Footnote Each classification has distinct tissue compositions and ranges of motion.
53
What is the defining tissue composition of fibrous joints?
Dense connective tissue ## Footnote Fibrous joints have no cavity and allow little to no movement.
54
Provide two specific examples of fibrous joints.
* Sutures * Distal tibiofibular syndesmosis ## Footnote These joints are characterized by their rigid structure.
55
What is the typical range of motion for fibrous joints?
Little to no movement ## Footnote Fibrous joints are often immovable.
56
What is the defining tissue composition of cartilaginous joints?
Cartilage connection ## Footnote Cartilaginous joints allow limited movement.
57
Provide two specific examples of cartilaginous joints.
* Pubic symphysis * Epiphyseal plate ## Footnote These joints connect bones with cartilage.
58
What is the typical range of motion for cartilaginous joints?
Limited movement ## Footnote Cartilaginous joints allow more movement than fibrous joints but less than synovial joints.
59
What is the defining tissue composition of synovial joints?
Fluid-filled cavity and articular capsule ## Footnote These joints are characterized by their high range of motion.
60
Provide two specific examples of synovial joints.
* Hip (ball-and-socket) * Elbow (hinge) ## Footnote Synovial joints are the most movable type of joint.
61
What are the major components of a typical synovial joint?
* Articular capsule * Articular cartilage * Synovial cavity * Synovial fluid ## Footnote Each component plays a crucial role in joint function.
62
What is the function of the articular capsule in a synovial joint?
Provides strength and secretes synovial fluid ## Footnote The capsule consists of fibrous and synovial layers.
63
What is the role of articular cartilage in a synovial joint?
Reduces friction and absorbs shock ## Footnote Articular cartilage is typically made of hyaline cartilage.
64
What is the synovial cavity?
Space containing synovial fluid ## Footnote This cavity allows for smooth movement of the joint.
65
What is the function of synovial fluid?
Lubrication, nourishment, and cushioning ## Footnote Synovial fluid is essential for pain-free movement.
66
What are accessory structures in joint function?
* Ligaments * Tendons * Bursas * Menisci ## Footnote These structures support and stabilize joints.
67
What role do ligaments play in joint function?
Connect bone to bone and provide stability ## Footnote Ligaments help to maintain joint integrity.
68
What role do tendons play in joint function?
Connect muscle to bone and transmit movement ## Footnote Tendons are crucial for joint movement.
69
What is the function of bursas in joint function?
Reduce friction between moving structures ## Footnote Bursas are fluid-filled sacs that cushion joints.
70
What role do menisci serve in joint function?
Shock absorption and stability ## Footnote Menisci are fibrocartilage pads that enhance joint function.
71
What is the concept of the 'Fulcrum Process'?
Describes the three classes of lever systems in the body ## Footnote Each class has a different arrangement of fulcrum, force, and resistance.
72
Describe the arrangement of the first-class lever system.
Fulcrum between force and resistance ## Footnote An example is nodding the head.
73
Describe the arrangement of the second-class lever system.
Resistance between fulcrum and force ## Footnote An example is standing on tiptoes.
74
Describe the arrangement of the third-class lever system.
Force between fulcrum and resistance ## Footnote An example is the biceps at the elbow, and this is the most common lever system.
75
What is the relationship between structural and functional classifications of joints?
* Fibrous → synarthrosis (immovable) * Cartilaginous → amphiarthrosis (slightly movable) * Synovial → diarthrosis (freely movable) ## Footnote The structure of a joint directly influences its functional capacity.
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