Final answer:
Proprioceptors are specifically responsible for determining foot position while standing on an unstable surface.2) Proprioceptors
Step-by-step explanation:
The receptors specifically responsible for determining foot position while standing on an unstable surface are proprioceptors. Proprioceptors are found in joints, tendons, and muscles, and they detect the position of different parts of the body in relation to each other and the surrounding environment. These receptors allow us to maintain balance and perform activities like walking and standing.