Understanding the Human Ear

The video explains the anatomy and function of the human ear, divided into the outer, middle, and inner ear. The outer ear includes the pinna and ear canal, which collect sound. The middle ear contains the eardrum and ossicles, which transmit sound to the inner ear. The inner ear, comprising the cochlea and vestibular system, is responsible for hearing and balance. Sound waves cause vibrations that are converted into neural impulses, allowing us to perceive sound.

What are the three main parts of the human ear?

• Upper, Lower, and Middle ear

• Outer, Inner, and Central ear

• Outer, Middle, and Inner ear

• External, Internal, and Middle ear

What is the function of the Pinna in the outer ear?

• To amplify sound

• To protect the inner parts of the ear

• To produce earwax

• To balance the ear pressure

Which part of the outer ear helps in detecting the vertical plane of sound?

• Pinna

• Ear canal

• Ossicles

• Eardrum

What is the function of the Eustachian tube in the middle ear?

• To transmit sound to the inner ear

• To equalize pressure between the middle ear and the atmosphere

• To produce earwax

• To protect the eardrum

Which small bone in the middle ear is also known as the hammer?

• Malleus

• Incus

• Stapes

• Cochlea

What is the primary function of the vestibular portion of the inner ear?

• Hearing

• Balance

• Producing earwax

• Amplifying sound

Which part of the inner ear is responsible for hearing?

• Cochlea

• Utricle

• Saccule

• Semicircular canals

What type of fluid is found in the Scala media of the cochlea?

• Perilymph

• Endolymph

• Cerebrospinal fluid

• Blood

What separates the Scala vestibuli from the Scala media in the cochlea?

• Annular ligament

• Tectorial membrane

• Reissner's membrane

• Basilar membrane

What happens when the stereocilia of the outer hair cells shear on the tectorial membrane?

• They open ion gates leading to chemical changes

• They produce earwax

• They balance ear pressure

• They amplify sound