Muscles and Respiration Quiz

What is the primary function of the muscles during inspiration (inhalation)?

• Decrease the size of the thoracic cavity

• Increase the size of the thoracic cavity

• Relax the diaphragm

• Contract the abdominal muscles

Which muscles are deep to the external intercostals?

• Diaphragm

• Internal intercostals

• Abdominal muscles

• Pectoral muscles

What happens to the central tendon of the diaphragm during inspiration?

• It moves superiorly

• It remains stationary

• It moves inferiorly

• It contracts laterally

Which muscle is involved in forced expiration and helps compress and hold abdominal organs in place?

• External oblique

• Rectus abdominis

• Transversus abdominis

• Levator scapulae

What is the deepest abdominal muscle with fibers that project transversely?

• Internal oblique

• Rectus abdominis

• Transversus abdominis

• Trapezius

Which muscle is partitioned into four segments by fibrous tendinous intersections?

• External oblique

• Rectus abdominis

• Serratus anterior

• Rhomboid major

Which muscle helps elevate and inferiorly rotate the scapula?

• Levator scapulae

• Trapezius

• Serratus anterior

• External oblique

Which muscle is fan-shaped and located between the ribs and scapula, helping to protract and stabilize the scapula?

• Rhomboid major

• Serratus anterior

• Rectus abdominis

• Internal oblique

Which muscle is a prime mover of the glenohumeral joint and is known for its broad triangular shape on the back?

• Pectoralis major

• Deltoid

• Latissimus dorsi

• Triceps brachii

What is the primary function of the deltoid muscle?

• Flexes and adducts the arm

• Prime abductor of the arm

• Extends and medially rotates the arm

• Assists in flexing the arm