Beginner External Intercostal Muscles Quiz
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This quiz contains 10 questions. Click below to begin.
Q1. Where are the external intercostal muscles located?
- Within the lungs
- Inside the pericardium
- Between adjacent ribs
- Below the diaphragm
Q2. Which intercostal muscle layer is most superficial?
- External intercostals
- Innermost intercostals
- Subcostal muscles
- Internal intercostals
Q3. In which general direction do external intercostal fibers run?
- Inferoposteriorly
- Inferoanteriorly
- Vertically
- Horizontally
Q4. What is a major action of the external intercostal muscles?
- Depress the mandible
- Elevate the ribs
- Contract the heart
- Close the larynx
Q5. External intercostal contraction primarily assists which phase of breathing?
- Swallowing
- Phonation
- Inspiration
- Quiet expiration
Q6. Which nerves innervate the external intercostal muscles?
- Accessory nerves
- Vagus nerves
- Intercostal nerves
- Phrenic nerves
Q7. External intercostal muscles belong to which anatomical region?
- Pelvic floor
- Posterior abdominal wall
- Cranial cavity
- Thoracic wall
Q8. Which muscle layer lies directly deep to the external intercostals?
- Internal intercostals
- Pectoralis major
- Diaphragm
- Serratus anterior
Q9. What are the spaces containing the external intercostal muscles called?
- Pleural recesses
- Costal sinuses
- Intervertebral spaces
- Intercostal spaces
Q10. Besides moving the ribs, what do external intercostals help stabilize?
- Tracheal rings
- Heart valves
- Intercostal spaces
- Pulmonary alveoli