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NurseDive Free Nursing Practice Question
Where are the respiratory control areas located?
A. Hypothalamus
Hypothalamus -The hypothalamus regulates autonomic functions like temperature, but not primary breathing rhythms.
B. Pons and medulla oblongata
Pons and medulla oblongata -The medulla sets the basic rhythm of breathing, and the pons fine-tunes it.
C. Alveoli
Alveoli -Alveoli are sites of gas exchange, not neural control.
D. Cerebral cortex
Cerebral cortex -The cortex allows voluntary control of breathing but is not the main respiratory control center.
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Full Explanation
A. Hypothalamus -The hypothalamus regulates autonomic functions like temperature, but not primary breathing rhythms.
B. Pons and medulla oblongata -The medulla sets the basic rhythm of breathing, and the pons fine-tunes it.
C. Alveoli -Alveoli are sites of gas exchange, not neural control.
D. Cerebral cortex -The cortex allows voluntary control of breathing but is not the main respiratory control center.
Similar Questions
Differentiate between minute ventilation and alveolar ventilation.
A. Minute ventilation is the volume of air that reaches the alveoli each minute. Alveolar ventilation is the volume of air that moved into the respiratory passages each minute.
Minute ventilation is the volume of air that reaches the alveoli each minute. Alveolar ventilation is the volume of air that moved into the respiratory passages each minute. Reversed definitions.
B. Minute ventilation is the number of breaths taken each minute. Alveolar ventilation is the amount of air in the alveoli each minute.
Minute ventilation is the number of breaths taken each minute. Alveolar ventilation is the amount of air in the alveoli each minute. Minute ventilation is volume, not rate.
C. Minute ventilation is the volume of air moved into the upper respiratory tract each minute. Alveolar ventilation is the volume of air moved into the lower respiratory tract each minute.
Minute ventilation is the volume of air moved into the upper respiratory tract each minute. Alveolar ventilation is the volume of air moved into the lower respiratory tract each minute. Both definitions are wrong.
D. Minute ventilation is the volume of air moved into the respiratory passages each minute. Alveolar ventilation is the volume of air that reaches
Minute ventilation is the volume of air moved into the respiratory passages each minute. Alveolar ventilation is the volume of air that reaches the alveoli each minute. Minute ventilation = tidal volume × respiratory rate; alveolar ventilation accounts for dead space.
Full Explanation
A. Minute ventilation is the volume of air that reaches the alveoli each minute. Alveolar ventilation is the volume of air that moved into the respiratory passages each minute. Reversed definitions.
B. Minute ventilation is the number of breaths taken each minute. Alveolar ventilation is the amount of air in the alveoli each minute. Minute ventilation is volume, not rate.
C. Minute ventilation is the volume of air moved into the upper respiratory tract each minute. Alveolar ventilation is the volume of air moved into the lower respiratory tract each minute. Both definitions are wrong.
D. Minute ventilation is the volume of air moved into the respiratory passages each minute. Alveolar ventilation is the volume of air that reaches the alveoli each minute. Minute ventilation = tidal volume × respiratory rate; alveolar ventilation accounts for dead space.
What drives the air out of the lungs during quiet expiration?
A. Contraction of smooth muscles in airways
Contraction of smooth muscles in airways -Smooth muscle constriction occurs in forced breathing or pathology, not quiet expiration.
B. Surface tension and the elastic recoil of lung tissues
Surface tension and the elastic recoil of lung tissues -Quiet expiration is passive, driven by elastic recoil and alveolar surface tension.
C. Contraction of the diaphragm
Contraction of the diaphragm -The diaphragm relaxes during expiration.
D. Contraction of the external intercostal muscles
Contraction of the external intercostal muscles -These contract during inspiration, not expiration.
Full Explanation
A. Contraction of smooth muscles in airways -Smooth muscle constriction occurs in forced breathing or pathology, not quiet expiration.
B. Surface tension and the elastic recoil of lung tissues -Quiet expiration is passive, driven by elastic recoil and alveolar surface tension.
C. Contraction of the diaphragm -The diaphragm relaxes during expiration.
D. Contraction of the external intercostal muscles -These contract during inspiration, not expiration.
What type of tissue forms the walls of the alveoli?
A. Ciliated columnar epithelium
Ciliated columnar epithelium -Found in bronchi and larger airways.
B. Simple squamous epithelium
Simple squamous epithelium -Type I alveolar cells form thin walls for efficient gas diffusion.
C. Stratified squamous epithelium
Stratified squamous epithelium -Stratified squamous is protective, found in mouth, esophagus.
D. Areolar connective tissue
Areolar connective tissue -Alveoli are not composed of connective tissue; they are lined by squamous epithelium.
Full Explanation
A. Ciliated columnar epithelium -Found in bronchi and larger airways.
B. Simple squamous epithelium -Type I alveolar cells form thin walls for efficient gas diffusion.
C. Stratified squamous epithelium -Stratified squamous is protective, found in mouth, esophagus.
D. Areolar connective tissue -Alveoli are not composed of connective tissue; they are lined by squamous epithelium.