B) Baroreceptor Reflexes
These are pressure-sensitive sensory receptors located in the aorta, internal carotid arteries and other large arteries in the neck and chest. These respond to stretch. These receptors send impulses to the CV centre to help regulate BP.
C) Chemoreceptors Reflexes
These monitor chemical composition of blood and are located close to the baroreceptors. They detect changes in blood levels of O2, CO2, hypoxia, acidosis, etc. These receptors also send information to the CV centre to help regulate BP. In addition, these receptors provide input to the respiratory centre in the brain stem to adjust the rate of breathing.
D) Hormonal Regulation
Renin-Angiotensin-Aldosterone (RAA) System
1) Blood flow is monitored in the kidneys and as it decreases, specialized cells in the kidneys secrete Renin into the blood stream.
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