Final Practice Quiz- Vestibular System questions and answers

Final Practice Quiz- Vestibular System questions and answers Movement of the stereocilia (type of microvili) on a hair cell towards the kinocilium causes an - answer-increase in membrane potential of the hair cell; depolarization Hairs of hair cells in the vestibular sensory epithelia are embedded in - answer-the gelatinous membrane Hair cells in the crista ampullar of a semi circular canal are - answer-all in the same direction; turn your head one way and it's excitatory, turn it the other way and it's inhibitory Macula hair cells have their hairs in - answer-all directions! No matter which way you turn your head they can sense which direction it is Hair cells in the ampullae of the six semicircular canals are organized so that any rotation will - answer-stimulate increased activity in at least one and decreased activity in at least one Damage to the choclear nerve results in - answer-permanent hearing loss Vestibular nuclei lie - answer-medial to inferior peduncle and extend b/n rostral medullar to rostral pons lateral vestibulospinal tract projects to neurons along - answer-entire length of spinal cord; they are responsible for balance Vestibulor occular reflex is due to - answer-termination of axons in the vestibular nerve on its nuclei and then to the occulomotor nuclei and then on the motor neurons in the abducens and occulomotor nuclei Vestibular Occular reflex - a