Question 1:
Which part of the ear collects sound waves?
Explanation: The correct answer is B) Eardrum. The eardrum, also known as the tympanic membrane, is a thin, membrane-like structure that separates the outer ear from the middle ear. It collects sound waves from the surrounding environment and vibrates in response to the sound waves, transmitting the vibrations to the middle ear.
Question 2:
Which part of the ear is responsible for converting sound vibrations into electrical signals?
Explanation: The correct answer is A) Cochlea. The cochlea is a spiral-shaped, fluid-filled structure in the inner ear. It plays a crucial role in the process of hearing by converting sound vibrations transmitted by the eardrum and the middle ear ossicles into electrical signals. These electrical signals are then sent to the brain through the auditory nerve for interpretation.
Question 3:
What is the function of the auditory nerve?
Explanation: The correct answer is B) Transmitting electrical signals to the brain. The auditory nerve, also known as the cochlear nerve, carries electrical signals from the cochlea to the brain. These signals contain information about the sound waves captured by the ear and are sent to the brain for processing and interpretation, resulting in the perception of sound.
Question 4:
What is the function of the ossicles in the middle ear?
Explanation: The correct answer is C) Amplifying sound vibrations. The ossicles, consisting of the malleus, incus, and stapes, are the three smallest bones in the human body. Their main function is to transmit and amplify sound vibrations from the eardrum to the inner ear. They act as a mechanical lever system, increasing the force of the sound vibrations as they pass from the larger surface area of the eardrum to the smaller oval window of the inner ear.
Question 5:
Which part of the ear is responsible for maintaining balance and equilibrium?
Explanation: The correct answer is C) Semicircular canals. The semicircular canals, located within the inner ear, are responsible for maintaining balance and equilibrium. They contain fluid-filled canals and sensory hair cells that detect the rotational movements of the head and provide information to the brain about the body's orientation in space. This information is crucial for maintaining balance and coordinating movements.