When the head moves, fluids known as perilymph and ________ in the semicircular canals and vestibule move, activating equilibrium receptors and hearing receptors.

Perilymph

A fluid in the inner ear. When this fluid moves, it activates hearing and equilibrium receptors.

Semicircular Canals

Structures within the inner ear that are key to the body's vestibular system, aiding in balancing and sensing orientation in three-dimensional space.

Equilibrium Receptors

Specialized sensory receptors that help maintain balance by detecting changes in head position and motion.