Muscle Anatomy Quiz

What type of muscle is striated and under voluntary control?

• Skeletal muscle

• Cardiac muscle

• Smooth muscle

• Visceral muscle

Which muscle type is responsible for involuntary movements?

• All of the above

• Cardiac muscle

• Smooth muscle

• Skeletal muscle

What is the primary action of the pectoralis major muscle?

• Rotation of the arm

• Abduction of the arm

• Extension of the arm

• Flexion of the arm

Which muscle acts as a fixator during movement?

• None of the above

• Synergist

• Antagonist

• Prime mover

What is the nerve supply for the pectoralis major?

• Medial and lateral pectoral nerves

• Thoracodorsal nerve

• Dorsal scapular nerve

• Accessory nerve

Which muscle is responsible for protracting the scapula?

• Latissimus dorsi

• Pectoralis major

• Pectoralis minor

• Serratus anterior

What type of muscle fibers run oblique to the long axis of the muscle?

• Parallel

• Circular

• Pennate

• Fusiform

Which muscle is primarily responsible for the elevation of the shoulder?

• Latissimus dorsi

• Serratus anterior

• Trapezius

• Rhomboidus major

What is the origin of the latissimus dorsi?

• Lower 6 thoracic spines

• Upper six costal cartilages

• Medial half of the clavicle

• First rib

Which muscle is involved in the retraction of the scapula?

• Pectoralis major

• Rhomboidus minor

• Serratus anterior

• Pectoralis minor