Question

Which of the following is FALSE about Utricles and Saccules?

A. They contain no kinocillium, as those cells are only found in the auditory system.
B. Respond to static head position relative to gravitational axis
C. Between them there is a tonic release of Neurotransmitters.
D. They are otolith organs.
E. They respond to linear accelerations of the head

Answer 1

The FALSE statement about Utricles and Saccules is that they contain no kinocillium, as kinocilia are present in the hair cells of both the auditory and vestibular systems, including the utricle and saccule.

Step-by-step explanation:

Of the provided statements about Utricles and Saccules, the statement that is FALSE is: "They contain no kinocillium, as those cells are only found in the auditory system." In fact, kinocilia are found in the hair cells of both the auditory and vestibular systems, playing a critical role in the detection of movement and balance. The utricle and saccule indeed respond to static head positions relative to the gravitational axis (B), have tonic release of neurotransmitters between them (C), are otolith organs (D), and respond to linear accelerations of the head (E).The utricle and saccule detect head orientation through the movement of calcium carbonate crystals within a viscous gel when the head is tilted, influencing the sensory hair cells beneath.

This movement allows the utricle and saccule to send signals via the vestibulocochlear nerve to the brain, informing it about the head's position and facilitating the maintenance of balance.