Explain why eight-year-old Carolina feels like she is still riding the merry-go-round, although she disembarked a few moments ago
What will be an ideal response?
When Carolina's head is in motion, as on the merry-go-round, the endolymph within the semicircular canals lags behind and pushes against the cupula. The endolymph bends the stereocilia, which either increases or decreases glutamate release from the hair cells and causes a corresponding change in the activity of neurons in the vestibular nerve. When she stopped riding the merry-go-round, the endolymph continued to move and bent the cupula in the direction opposite to that when she started turning her head. This has the opposite effect on glutamate release and the activity of the vestibular nerve, and her brain interpreted the change to mean that head rotation has stopped. However, since endolymph lags behind, Carolina continued to have a sensation of movement for a few moments after disembarking the merry-go-round.
You might also like to view...
The principle that increasing the end-diastolic volume results in a corresponding increase in the stroke volume is known as
A) afterload. B) cardiac capacity. C) cardiac reserve. D) Frank-Starling principle. E) expandibility.
Age-related hearing impairment is known as ________.
A. presbycusis B. presbyopia C. otosclerosis D. conduction deafness
Which of the following muscles functions to close the eye?
A. Gracilis B. Soleus C. Brachialis D. Orbicularis oculi
Hematopoiesis refers only to the production of those blood cells which respond to infectious organisms in the body
a. true b. false