The terminal bronchi enters the alveoli and become the alveolar ducts.
True
False
The Correct Answer is B
Correct answer: False
Terminal bronchioles represent the smallest airways in the conducting zone of the respiratory system and do not directly open into alveoli. Instead, they transition into respiratory bronchioles, which are the initial structures of the respiratory zone capable of gas exchange. The respiratory bronchioles then branch into alveolar ducts, which terminate in clusters of alveoli where the majority of gas exchange occurs. This anatomical progression ensures that air is conducted efficiently through the bronchiolar tree while maintaining separation between the conducting and respiratory zones. Therefore, stating that terminal bronchioles directly enter the alveoli is inaccurate and does not reflect the true structural organization of the lungs.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. It acts as a nutrient source: Oxygen is not a nutrient and does not provide calories or structural substrates for the body. Nutrients such as glucose, fatty acids, and amino acids supply the carbon skeletons and energy used in cellular respiration, while oxygen plays a distinct role in the electron transport process.
B. It forms carbonic acid: Carbonic acid is formed when carbon dioxide combines with water, not oxygen. While oxygen participates in oxidative metabolism that produces carbon dioxide, it is not directly responsible for carbonic acid formation in cellular respiration.
C. It is the final electron acceptor: In aerobic cellular respiration, oxygen serves as the terminal electron acceptor in the electron transport chain within the mitochondria. It accepts electrons and hydrogen ions to form water, allowing oxidative phosphorylation to continue and enabling efficient ATP production. Without oxygen, the electron transport chain halts.
D. It directly generates ATP: Oxygen does not directly synthesize ATP. ATP is produced through oxidative phosphorylation by ATP synthase, which uses the proton gradient generated by electron transport. Oxygen’s role is indirect but essential in sustaining the gradient by accepting electrons at the end of the chain.
Correct Answer is A
Explanation
A. Pleural cavity: The pleural cavity is the potential space between the parietal pleura (lining the thoracic wall) and the visceral pleura (covering the lungs). It contains a small amount of lubricating fluid that reduces friction during lung expansion and contraction, allowing smooth respiratory movements while maintaining negative pressure to facilitate lung inflation.
B. Bronchial space: The bronchial space refers to the lumen of the bronchi through which air passes. It is not a cavity between pleural layers and does not play a role in pleural fluid dynamics or lung expansion.
C. Alveolar cavity: Alveolar cavities are microscopic air spaces within the lungs where gas exchange occurs. They are internal to the lung tissue and do not exist between the pleural layers.
D. Thoracic cavity: The thoracic cavity is the large compartment of the chest housing the lungs, heart, and major vessels. While it contains the pleural cavities, it is not specifically the space between the parietal and visceral pleurae.
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