Final answer:
The incorrect pairing is a. cochlear duct- cupula. The cochlear duct is part of the cochlea and contains the organ of Corte, while the cupula is a structure in the ampulla of the semicircular canals in the vestibular system.
Step-by-step explanation:
The question asks which of the following pairings is incorrect:
- a. cochlear duct- cupula
- b. vestibule-macula
- c. ampulla-otolith
- d. semicircular duct- ampulla
The incorrect pairing is a. cochlear duct- cupula. The cochlear duct is actually part of the cochlea and contains the organ of Corte, which is responsible for auditory transduction. The cupula is a structure in the ampulla at the base of the semicircular canals in the vestibular system, which responds to rotational movements of the head.
The correct pairings are:
- b. vestibule-macula: The macula is the sensory organ within the vestibule that detects changes in gravity and linear acceleration.
- c. ampulla-otolith: This is incorrect because the ampulla contains the hair cells and the cupula. Instead, the otoliths (calcium carbonate crystals) are found in the structures known as the utricle and saccule, not the ampulla.
- d. semicircular duct- ampulla: This is correct as the semicircular ducts connect to the ampullae, which contain the sensory hair cells and cupula for transduction of rotational movements.