Question

1.) Select the CORRECT statement about hearing.

	Hair cell activation involves G-protein signaling.
	Opening of mechanosensitive channels leads to hair cell hyperpolarization.
	Damage to the hair cells is a form of conduction deafness.
	Hair cells distal to the oval window sense low-frequency sound waves.

2.) The stereocilia used for hearing are located in the __________.

Utricle, Scala Tympani, cochlear duct or scala vestibuli

3.)

An inhibitor of G-protein coupled receptors would NOT influence this taste sensation.

	sweet
	umami
	salty
	bitter

4.)

In the DARK photoreceptors in the retina ____________.

	depolarize
	stop releasing glutamate
	have an active phosphodiesterase
	have the lowest levels of cGMP

Answer 1

1) high frequency waves creates maximum displacement of the basal membrane close to the ovel window and low frequency travels along the basal membrane and create maximum displacement in distal end

answer is Hair cells distal to the oval window sense low-frequency sound waves.

2) apical tip of hair cells are stereocilia that extend to the endolymph of cochlear duct

hence answer is cochlear duct

3) Salt taste sensation is detected through ion channel not through G-protein coupled receptor, hence blockade of G- protein coupled receptor will not influences Salt taste

hence answer is Salty

4) In the dark photoreceptors present in the retina undergo depolarization and more amount of inhibitory neurotransmiters are released (glutamate)

hence answer is depolarization