question_answer

Direction: Questions from are based on the following passage.

Ear is a sensory organ which enables us to hear the sound of our surrounding. It is divided into three parts; external ear, middle ear and internal ear. The external ear consists of pinna and the ear canal. The outer fleshy part of the external ear which is visible from outside is known as pinna. Its main function is to collect the sound waves and guide them to the middle ear. Middle ear is separated from the ear canal by a tightly stretched membrane called the eardrum or tympanic membrane. The eardrum is attached to the three bones hammer, anvil and stirrup. The function of middle ear is to pick up, amplify and transmits sound waves to the inner ear. The inner ear consists of a liquid filled coiled tube known as cochlea. It shaped like a snail and connected to the stirrup of the middle ear. The cochlea has special sensory cells called hair cells. The hair cells are connected to the auditory nerve which is connected to the brain. When a sound wave causes the sensitive hair cells in the cochlea to move, electrical signals are produced. These electrical signals are sent to the brain through auditory nerve. The brain interprets these signals and gives us the sensation of hearing sound.

What is the function of middle ear?

A) Collecting the sound waves from surrounding

B) Picking up sound waves from ear canal, amplifying them and then transmitting them to internal ear

C) Converting sound waves into electrical impulses

D) All of these

E) None of these