Hearing & Balance: Crash Course A&P

The video explores how sound is transmitted and processed by the human ear, explaining the anatomy and function of the external, middle, and inner ear. It details how vibrations are converted into electrical signals for the brain to interpret as sound. The video also covers the ear's role in maintaining balance and the causes of motion sickness.

What is the basic mechanism by which sound is created?

• Sound is created by light waves.

• Sound is created by vibrations in the air.

• Sound is created by electrical impulses.

• Sound is created by chemical reactions.

Which part of the ear is responsible for catching sound waves?

• Cochlea

• Eardrum

• Stapes

• Pinna

What is the main function of the middle ear?

• To maintain balance

• To catch sound waves

• To amplify sound waves

• To convert sound into electrical signals

How does the cochlea process different sound frequencies?

• By amplifying sound waves

• By vibrating different sections of the basilar membrane

• By converting sound into light

• By using the eardrum

What role does the organ of Corti play in hearing?

• It converts vibrations into electrical signals.

• It amplifies sound waves.

• It catches sound waves.

• It maintains balance.

Which structure in the ear helps maintain balance?

• Pinna

• Vestibular apparatus

• Eardrum

• Cochlea

How do the semicircular canals detect head movement?

• By converting light signals

• By detecting fluid movement

• By using sound waves

• By amplifying sound

What is the function of the utricle and saccule?

• To convert sound into light

• To sense motion of fluid

• To detect sound waves

• To amplify sound

What causes motion sickness according to the video?

• Lack of sound

• Sensory conflict between the vestibular system and visual input

• Incorrect head movement

• Excessive sound waves

What happens when the brain receives conflicting signals from the vestibular system and visual input?

• It improves hearing

• It causes motion sickness

• It enhances balance

• It increases sound frequency