Biomechanics and Mechanics Quiz

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What is the difference between static and dynamic systems?

Static systems have no acceleration, while dynamic systems have constant acceleration
Static systems are at rest or moving at a constant velocity, while dynamic systems are accelerating or decelerating (correct)
Static systems are always in motion, while dynamic systems are stationary
Static systems have a constant velocity, while dynamic systems have varying velocity

What are the cardinal planes?

Horizontal, vertical, and frontal planes
Frontal, sagittal, and transverse planes (correct)
Transverse, horizontal, and lateral planes
Sagittal, vertical, and lateral planes

What is the definition of flexion vs extension?

Flexion decreases the angle between two body segments, while extension increases it (correct)
Extension is a lateral movement, while flexion is a medial movement
Extension decreases the angle between two body segments, while flexion increases it
Flexion occurs around a horizontal axis, while extension occurs around a vertical axis

What is the center of gravity? What is the center of mass?

The center of gravity is the point where weight is evenly distributed; the center of mass is the point where all mass is concentrated (D) Signup and view all the answers

What is the definition of osteopenia?

Loss of bone mass that leads to osteoporosis (B) Signup and view all the answers

Where are the muscle spindle fibers located and what is their function?

In the muscles to detect changes in muscle length (B) Signup and view all the answers

What is the function of synovial fluid?

To absorb shock in the joints (C) Signup and view all the answers

What is the difference between concentric muscle action and eccentric muscle action?

Concentric - shortening of the muscle; Eccentric - lengthening of the muscle (B) Signup and view all the answers

What is the parallel elastic component in muscle physiology?

A portion of connective tissue parallel to muscle fibers providing elasticity (D) Signup and view all the answers

What are overuse injuries typically caused by?

Repetitive stress on a particular part of the body (D) Signup and view all the answers

What is the difference between kinematics and kinetics?

Kinematics deals with motion parameters, while kinetics deals with forces. (D) Signup and view all the answers

What is the cardinal plane where abduction and adduction occur?

Frontal plane (D) Signup and view all the answers

What are the definitions of flexion vs extension?

Flexion reduces the angle between two body parts, while extension increases the angle. (B) Signup and view all the answers

What do medial and lateral refer to?

Medial refers to movements away from the midline, while lateral refers to movements toward the midline. (B) Signup and view all the answers

What is the main difference between acute and chronic conditions?

Acute conditions are severe and sudden, while chronic conditions are long-lasting. (D) Signup and view all the answers

What is the primary reason for the development of osteoporosis?

Loss of bone mass due to an imbalance between osteoblasts and osteoclasts. (B) Signup and view all the answers

What is the main function of synovial fluid?

Acting as a lubricant for smooth joint movement. (C) Signup and view all the answers