Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
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.
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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.
Similar Questions
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.
According to Boyle's law, as the volume of a container decreases.
A. the temperature increases
The temperature increases -Boyle’s law does not involve temperature (that’s Charles’ law).
B. the pressure decreases
The pressure decreases -Pressure increases when volume decreases.
C. the pressure increases
The pressure increases -Inverse relationship: decrease in volume leads to increase in pressure.
D. the temperature decreases
The temperature decreases -Not a factor in Boyle’s law.
Full Explanation
A. The temperature increases -Boyle’s law does not involve temperature (that’s Charles’ law).
B. The pressure decreases -Pressure increases when volume decreases.
C. The pressure increases -Inverse relationship: decrease in volume leads to increase in pressure.
D. The temperature decreases -Not a factor in Boyle’s law.
Where is the ventral respiratory group located?
A. In the lungs
In the lungs -Control centers are in the brainstem, not lungs.
B. In the pons
In the pons -The pons houses the pneumotaxic and apneustic centers.
C. In the midbrain
In the midbrain -The midbrain controls reflexes, not primary breathing rhythm.
D. In the medulla oblongata
In the medulla oblongata -The VRG in the medulla generates the basic breathing rhythm.
Full Explanation
A. In the lungs -Control centers are in the brainstem, not lungs.
B. In the pons -The pons houses the pneumotaxic and apneustic centers.
C. In the midbrain -The midbrain controls reflexes, not primary breathing rhythm.
D. In the medulla oblongata -The VRG in the medulla generates the basic breathing rhythm.