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The answer is visceroreceptors, which are specialized sensory receptors located within the internal organs. These receptors are integral to the autonomic nervous system as they monitor and respond to changes in the internal environment of the body, such as blood pressure, oxygen levels, and visceral pain. By providing feedback from internal organs to the central nervous system, visceroreceptors play a crucial role in maintaining homeostasis and regulating autonomic functions, such as heart rate and digestion.

In the context of the other receptor types: interstitial receptors generally refer to those that sense changes in the interstitial fluid or the extracellular matrix but are not specifically tied to autonomic functions; exteroceptors are responsible for sensing external stimuli (like touch, temperature, and pain), which relates more to conscious awareness and the sensory nervous system rather than autonomic functions. Proprioceptors, on the other hand, provide information about body position and movement, contributing to motor control, and do not primarily serve autonomic functions. Thus, visceroreceptors are the appropriate choice for their role in autonomic regulation.