Arrange the stages of events that take place during coughing in the correct sequence.
Understand the Problem
The question is asking to arrange the stages of events that occur during coughing into the correct sequence, based on the provided descriptions.
Answer
1: Irritant enters. 2: Receptors stimulated. 3: Vagus nerve impulses. 4: Deep inspiration. 5: Glottis closes. 6: Muscles contract. 7: Glottis opens. 8: Air expelled.
Stage 1: Irritant enters the trachea. Stage 2: Sensory receptors stimulated by irritant. Stage 3: Impulses sent by the vagus nerve to the respiratory centre. Stage 4: Deep inspiration. Stage 5: Closure of the glottis. Stage 6: Contraction of abdominal and respiratory muscles. Stage 7: Sudden opening of the glottis. Stage 8: Air expelled from the respiratory tract under pressure.
Answer for screen readers
Stage 1: Irritant enters the trachea. Stage 2: Sensory receptors stimulated by irritant. Stage 3: Impulses sent by the vagus nerve to the respiratory centre. Stage 4: Deep inspiration. Stage 5: Closure of the glottis. Stage 6: Contraction of abdominal and respiratory muscles. Stage 7: Sudden opening of the glottis. Stage 8: Air expelled from the respiratory tract under pressure.
More Information
Coughing is a complex reflex action involving these stages to clear irritants or blockages from the respiratory tract.
Tips
Ensure that deep inspiration occurs after the vagus nerve sends impulses and before the closure of the glottis.
Sources
- Anatomy and neuro-pathophysiology of the cough reflex arc - PMC - pmc.ncbi.nlm.nih.gov
- Solved - Anatomy and Physiology - studocu.com
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