Which of the following is a physiological effect produced by activated chemoreceptors?

Activated chemoreceptors play a crucial role in the body's response to changes in blood chemistry, particularly concerning oxygen, carbon dioxide, and pH levels. When these chemoreceptors detect low oxygen levels (hypoxia) or high levels of carbon dioxide (hypercapnia), they trigger a series of physiological responses designed to restore homeostasis.

Bradycardia and hypertension result from the activation of the chemoreceptors due to their impact on the autonomic nervous system. When chemoreceptors sense low oxygen levels, this can lead to a reflexive decrease in heart rate (bradycardia) as part of the body’s compensatory mechanisms. Additionally, the sympathetic nervous system may become activated in this scenario, leading to an increase in blood pressure (hypertension). This combination helps prioritize blood flow to vital organs despite the reduced oxygen availability.

This understanding underscores the significance of chemoreceptor activation in maintaining cardiovascular stability and addressing deficiencies in oxygenation. The interactions of heart rate and blood pressure driven by chemoreceptors highlight their vital role in ensuring adequate tissue perfusion during instances of respiratory distress or altered blood gas levels.