Chapter 9.2 Flashcards
what is formed by an elongated rigid object rotating around a fulcrum?
A. Pivot
B. Lever
C. Wedge
B. Lever
Pivot is another word for fulcrum
In which type of joint are the bones separated by a narrow fluid, filled, encapsulated space? A. Synchondrosis B. Cartilaginous C. Synovial D. Bony
C. Synovial
Within a musculoskeletal lever system, what is the fulcrum?
A. Muscules
B. Joints
C. Bones
B. Joints
What is the hyaline cartilage found at the end of bones within a synovial joint called?
A.Synochondrosis
B. Articular Cartilage
C. Meniscus
D. Joint Capsule
B. Articular Cartilage
What describes a first-class lever?
A. the effort is located between the fulcrum and resistance
B. The fulcrum is located between the effort and resistance.
C. the resistance is located between the fulcrum and effort.
B. The fulcrum is located between the effort and resistance.
A synovial joint cavity is enclosed by which of the following?
A. Meniscus
B. Joint capsule
C. Articular cartilage
B. Joint capsule
A. are the fibrocartilage pads found between bones
C. lines the surface of the bones in a synovial joint but does not enclose the joint
What structure is found between the bones of the temporomandibular joint? A. Fibrocartilage pad B. Meniscus C. Bursa D. Tendon
A. Fibrocartilage pad
Which act as a lever?
A. Bones
B. Muscles
C. Joints
A. Bones
Sitting in a chair and raising one thigh is an example of what class of lever system?
A. Second
B. Third
C. First
A. Second
In a musculoskeletal lever system, what force does the muscle contraction provide?
A. Tension
B. Effort
C. Torsion
D. Resistance
B. Effort
an opposing muscle may represent the resistance that the effort is applied against.
The forearm acts as a _______ lever when you flex your elbow.
Third Class
Which are parts of a joint capsule?
Synovial Membrane
Fibrous Capsule
Periosteum
Articular Cartilage
Synovial Membrane
Fibrous Capsule
What are articular discs, as the one in the temporomandibular joint, made of?
A. Hyaline Cartilage
B. Elastic Cartilage
C. Fibrocartilage
C. Fibrocartilage
The flexibility of a joint is assessed as which of the following? A. Range of Motion B. Amount of Cartilage C. Joint Classification D. Axes of MOvement
A. Range of Motion
What describes a second-class lever?
A. the effort is located between the fulcrum and resistance
B. The fulcrum is located between the effort and resistance.
C. the resistance is located between the fulcrum and effort.
C. the resistance is located between the fulcrum and effort.
How would a joint with three degrees of freedom be classified?
A. Monaxial
B. Biaxial
C. Mulitaxial
C. Multiaxial
Within the skeletal anatomy, what supplies the effort?
A. Muscle contraction
B. The effort arm
C. The resistance arm
A. Muscle contraction
Considering the axes of rotation, ______ joints allow movement in only one plane.
monaxial
What describes a third-class lever system?
A. the effort is located between the fulcrum and resistance
B. The fulcrum is located between the effort and resistance.
C. the resistance is located between the fulcrum and effort.
A. the effort is located between the fulcrum and resistance
The strength of ligaments and the action of muscles across a joint both affect which aspect of a joint?
A. The range of motion
B. The axes of rotation
C. The lever of classification
A. The range of motion
The humeroulnar joint is an example of which type of synovial joint?
A. Saddle
B. Pivot
C. Condyloid
D. Hinge
D. Hinge
The shoulder and hip joints are examples of______ joints.
A. Hinge
B. Condyloid
C. Saddle
D. Ball-and-socket
D. Ball-and-socket
Based on their degree of freedom, condylar joints are classified as _____ joints.
biaxial
Which type of synovial joint consists of two bones at the base of the thumb, one with a surface that is concave and the other that is convex? A. Pivot B. Plane C. Saddle D. Condylar
C. Saddle
A.Reason: A pivot joint has a rounded surface that rotates in a notch.
B. Reason: A plane joint consists of two flat surfaces gliding on one another.
D. A condylar joint is one with an oval convex surface on one bone that fits into a complementary-shaped depression on the other bone.
