Locomotion and Movement Chapter-Wise Test 12

Correct answer Carries: 4.

Wrong Answer Carries: -1.

Which of the following movements is an example of adduction?

Lifting the arm sideways
Bringing the arm towards the body
Bending the knee
Rotating the wrist
2

Adduction is the movement toward the midline of the body​.

Which condition is characterized by age-related degeneration of joint cartilage?

Osteoarthritis
Rheumatoid arthritis
Gout
Myasthenia gravis
1

Osteoarthritis is a degenerative joint disease caused by the breakdown of cartilage due to aging.

Which of the following conditions is caused by low calcium levels leading to muscle spasms?

Osteoporosis
Tetany
Gout
Arthritis
2

Tetany occurs due to low calcium levels, leading to involuntary muscle spasms.

Which structural component of skeletal muscle stores calcium ions required for contraction?

Sarcolemma
Sarcoplasmic reticulum
Myofibrils
T-tubules
2

The sarcoplasmic reticulum stores and releases calcium ions, which are essential for muscle contraction.

Which muscle fiber type is correctly matched to its function?

Red muscle fibers - Fast movements
White muscle fibers - High myoglobin content
Red muscle fibers - Slow and sustained activity
White muscle fibers - Aerobic respiration
3

Red muscle fibers are adapted for slow, sustained activity due to their high myoglobin and mitochondria content​.

Which structural protein is responsible for the elasticity of muscle fibers?

Myosin
Titin
Actin
Collagen
2

Titin is a large elastic protein that contributes to the elasticity and extensibility of muscle fibers.

Which muscle is responsible for flexing the forearm at the elbow joint?

Triceps brachii
Biceps brachii
Deltoid
Pectoralis major
2

The biceps brachii is the primary muscle responsible for flexing the forearm at the elbow joint.

Which statement about muscles is incorrect?

Cardiac muscles are involuntary.
Skeletal muscles are striated and voluntary.
Visceral muscles are voluntary in nature.
Smooth muscles are found in the walls of internal organs.
3

Visceral muscles are involuntary, not voluntary.

Which of the following structures is responsible for transmitting nerve impulses to muscle fibers?

Sarcolemma
Neuromuscular junction
Sarcoplasmic reticulum
Synovial membrane
2

The neuromuscular junction is the site where motor neurons transmit signals to muscle fibers, triggering contraction.

Which hormone plays a role in bone resorption by stimulating osteoclast activity?

Calcitonin
Parathyroid hormone (PTH)
Thyroxine
Insulin
2

Parathyroid hormone (PTH) increases blood calcium levels by stimulating osteoclast activity.

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