"I'm going to hold my breath until I die and it will be all your fault!" shrieked 6-year-old Riley at her father. Why would she be unable to carry out her threat?
Decreased CO2 and hydrogen ion concentrations and increased oxygen concentration stimulate her chemoreceptors, triggering inspiration.
The inflation reflex would not her allow to keep her lungs full of air for a prolonged period. The reflex would trigger inspiration.
Increased CO2 and hydrogen ion concentrations and decreased oxygen concentration stimulate her chemoreceptors, triggering inspiration.
The diaphragm will begin to fatigue and will not be able to hold its contracted position for more than a short period of time.
The Correct Answer is C
A. Decreased CO₂ and hydrogen ion concentrations and increased oxygen concentration stimulate her chemoreceptors, triggering inspiration. - Chemoreceptors respond to increased CO₂/decreased O₂.
B. The inflation reflex would not allow her to keep her lungs full of air for a prolonged period. The reflex would trigger inspiration. -The Hering–Breuer reflex prevents overinflation, not relevant here.
C. Increased CO₂ and hydrogen ion concentrations and decreased oxygen concentration stimulate her chemoreceptors, triggering inspiration. -Rising CO₂ strongly stimulates medullary chemoreceptors → involuntary breathing resumes.
D. The diaphragm will begin to fatigue and will not be able to hold its contracted position for more than a short period of time. -Breathing resumes due to chemoreceptor drive before muscle fatigue sets in.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is {"dropdown-group-1":"B"}
Explanation
Correct answer: Esophagus
The esophagus is the muscular alimentary tube that runs posterior to the trachea from the pharynx to the stomach; a tube positioned behind the heart/sternum on the model marked X corresponds to the esophagus.
Correct Answer is C
Explanation
A. Submucosa: submucosa is connective tissue containing blood/lymph vessels and glands, not the epithelial lining.
B. Muscularis: muscularis is smooth muscle (inner circular/outer longitudinal layers) responsible for peristalsis, not epithelial.
C. Mucosa: the mucosa includes the epithelial lining, lamina propria, and may contain folds and mucus-secreting glands (e.g., gastric mucosa).
D. Serosa: serosa is the outermost connective tissue/mesothelial covering of the gut, not the epithelial absorptive/secreting layer.
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