What happens to the pressure inside the lungs during quiet expiration?
Correct answer: C. It becomes higher than atmospheric pressure
- A. It becomes lower than atmospheric pressure
- B. It becomes equal to venous pressure
- C. It becomes higher than atmospheric pressure
- D. It becomes equal to pleural pressure
Explanation
During quiet expiration, the respiratory muscles relax and elastic recoil decreases lung volume. This raises intrapulmonary pressure slightly above atmospheric pressure, causing air to leave the lungs.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Respiratory System
The respiratory system includes the air passages, lungs, pleura, alveoli and the mechanics of breathing. It explains pulmonary ventilation, gas exchange, oxygen and carbon dioxide transport, regulation of breathing, and the difference between external respiration in the lungs and internal respiration in body tissues.
Practise Respiratory System
40 free Respiratory System MCQs from Anatomy and Physiology for Nursing, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Anatomy and Physiology for Nursing questions like this
Anatomy and Physiology for Nursing is on 4 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Respiratory System questions
Which structure closes over the laryngeal opening during swallowing to help prevent food entering the trachea?
Which change is most likely to stimulate an increase in the rate and depth of breathing in a healthy person?
A patient has a respiratory rate of 30 breaths per minute, shallow breathing, and increasing restlessness. Which finding should the nurse report first?
A patient has rapid, shallow breathing after abdominal surgery. Which measurement best reflects the amount of fresh air reaching the alveoli each minute?
A healthy adult has a tidal volume of 500 mL, a respiratory rate of 12 breaths per minute, and an anatomical dead space of 150 mL. What is the approximate alveolar ventilation per minute?
Which pleural layer is directly attached to the surface of the lungs?