Vision and Optics — Flashcards

Flashcard 1: Which types of sensory receptor adapt quickly? _____ and Meissner corpuscles

Answer: Pacinian corpuscles

Flashcard 2: Wave V of BERA is produced by the _____

Answer: inferior colliculus

Extra: BERA (Brainstem Evoked Response Audiometry) waves: I: Auditory nerve II: Cochlear nucleus III: Superior olivary complex IV: Lateral lemniscus V: Inferior colliculus (most stable/prominent wave) Mnemonic: **E.CO.L.I.**

Flashcard 3: Wave V of BERA is produced by the _____

Answer: inferior colliculus

Flashcard 4: Click stimulus is used for _____

Answer: BERA (Brainstem Evoked Response Audiometry)

Flashcard 5: What is the function of the crista ampullaris?

Answer: Detection of angular acceleration (rotation)

Extra: The crista ampullaris is the sensory organ located in the semicircular canals. It detects angular acceleration and deceleration (rotational movement). In contrast, the maculae (in the utricle and saccule) detect linear acceleration and gravity.

Flashcard 6: What stimuli do Meissner's corpuscles respond to?

Answer: Tap and flutter

Flashcard 7: Metarhodopsin II activates _____ member of G proteins which leads to closure of Na+ channels and hyperpolarization

Answer: transducin

Flashcard 8: _____ theory states that a sound wave, depending on its frequency, reaches maximum amplitude on a particular place on the basilar membrane and stimulates that segment.

Answer: Traveling wave

Flashcard 9: Accommodation (near response) occurs via contraction of the _____ muscle, which relaxes the suspensory ligaments and allows the lens to become more round

Answer: ciliary

Flashcard 10: What senses are impaired with zinc deficiency? _____ and smell (anosmia)

Answer: taste (dysgeusia)