Question

1.Please describe the difference between action potential and sensory potential.

2.please explain how sound travels through the ear and heard by us?

Answer 1

1.The action potential is known to degrade quickly as they move down from the synapse.Conversly,sensory potential is small and many are needed to achieve the threshold.

2. Sound waves travels through ears and convert into electrical signal to the brain.and it occurs through several steps -

a.sound waves travels through the ear canal and reaches to ear drum.

b.The eardrum vibrates upon incoming sound waves and further it travels to the ear bones of middle ear (malleus,incus and stapes).

c.The bones of middle ears amplify those sound waves and send them to the cochlea in inner ear.

d. Due to vibration, fluid filled in chochlea ripples and travel along the basilar membrane.Hair cells present on the basilar membrane moves up and down which causes stereocilia bending. Stereocilia bending promotes the opening of the pore like channels.

e.once pores get open up, chemicals rushes into it and creates electrical signal.The auditory nerves carries these signals to brain and which turns into the sound what we hear and recognize.