Which of the following statements is true? The chemoreceptors in the carotid bodies are particularly sensitive to: Which part of the QRS complex represents the repolarisation of th... Which of the following statements is true? The chemoreceptors in the carotid bodies are particularly sensitive to: Which part of the QRS complex represents the repolarisation of the atria? When you take a blood pressure reading, the higher value represents ________:
Understand the Problem
The question is asking about various aspects of human physiology related to the cardiovascular system, including neurotransmitters, chemoreceptors sensitivity, ECG waveforms, and blood pressure readings. It seeks to identify accurate statements or concepts regarding these topics.
Answer
61: a; 62: b; 63: d; 64: b
61: a) The vagus nerve releases acetylcholine at the myocardium. 62: b) Hypoxia. 63: d) None of the above (atrial repolarization is masked by the QRS complex). 64: b) The systolic reading, which indicates the contraction of the ventricles.
Answer for screen readers
61: a) The vagus nerve releases acetylcholine at the myocardium. 62: b) Hypoxia. 63: d) None of the above (atrial repolarization is masked by the QRS complex). 64: b) The systolic reading, which indicates the contraction of the ventricles.
More Information
The carotid body chemoreceptors are sensitive to low oxygen levels (hypoxia). The QRS complex in ECG masks atrial repolarization. The systolic blood pressure reflects ventricular contraction.
Tips
A common mistake is confusing the meaning of systolic and diastolic readings in blood pressure.
Sources
- Carotid body chemoreceptors: physiology, pathology, and ... - pmc.ncbi.nlm.nih.gov
- Course #90824: Clinical Management of Atrial Fibrillation - NetCE - netce.com
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