Final answer:
The clear fluid within the membranous labyrinth is a) endolymph, and both the vestibular and auditory systems contain hair cells. Sudden deceleration affects the fluid in the semicircular canals, signaling the brain to help maintain balance.
Step-by-step explanation:
The clear fluid contained within the membranous labyrinth of the ear is a) endolymph.
The membranous labyrinth is a collection of fluid-filled tubes and chambers, which includes the cochlea, semicircular canals, and the vestibules (utricle and saccule).
The vestibular system and auditory system are interconnected and share some common structures; for example, they both contain hair cells that function as sensory receptors.
When you experience sudden deceleration in a car, the fluid in the semicircular canals moves due to inertia, this movement is detected by the hair cells which then send signals to the brain to help maintain balance and spatial orientation.