Thoracic Cage Quiz

How many pairs of ribs does the thoracic cage have?

• 10 pairs

• 11 pairs

• 12 pairs

• 13 pairs

Which ribs are referred to as "floating ribs"?

• Pairs 1 and 2

• Pairs 11 and 12

• Pairs 8 and 9

• Pairs 5 and 6

What is the only bony articulation between the thorax and the arm?

• Sternocostal

• Costochondral

• Sternoclavicular

• Intervertebral

Which ribs are also called "false ribs"?

• Pairs 1-7

• Pairs 8-12

• Pairs 11-12

• Pairs 3-5

Which muscle is responsible for adducting, extending, and medially rotating the arm?

• Rhomboids

• Latissimus dorsi

• Trapezius

• Pectoralis minor

What is the action of the pectoralis major muscle?

• Elevates and rotates the scapula

• Adduction and medial rotation of the arm

• Tenses the abdominal wall

• Draws the shoulder anteriorly

Which nerve innervates the diaphragm?

• Phrenic

• Intercostal nerves

• Thoracodorsal

• Medial pectoral

What is the function of the external intercostals?

• Depress the rib cage

• Raise the rib cage upward and outward

• Tense the abdominal wall

• Medially rotate the arm

Which muscle tenses the abdominal wall and flexes the trunk?

• Rectus abdominis

• Trapezius

• Rhomboids

• Latissimus dorsi

What is found in the left upper quadrant of the abdomen?

• Appendix and ascending colon

• Descending colon

• Stomach, spleen, left kidney, and pancreas

• Liver, gallbladder, and right kidney