Question 1

Within the organ of Corti, there are "bristles" atop each hair cell that brush against the tectorial membrane and trigger nerve impulses that flow to the brain.These "bristles" are called

Accepted Answer

Stereocilia are the hair-like projections found on the top of hair cells within the organ of Corti. When sound waves cause the basilar membrane to vibrate, the stereocilia brush against the tectorial membrane, which triggers nerve impulses that travel to the brain and enable us to hear. The other options (B) auditory ossicles, (C) umami, and (D) stapes are not relevant to the function of the organ of Corti.

Question 2

Which one of the following sequences is the correct one for audition?

Accepted Answer

The correct sequence for audition starts with the eardrum (which vibrates in response to sound waves), followed by the ossicles (tiny bones that amplify and transmit the vibrations to the cochlea), then the cochlea (a fluid-filled spiral structure that converts the vibrations into neural signals), and finally, the hair cells (sensory cells within the cochlea that detect the vibrations and initiate the signal to the brain).

Question 3

Sound energy is converted to nerve impulses by the hair cells inside the

Accepted Answer

The hair cells inside the cochlea are responsible for converting sound energy into nerve impulses. The tympanic membrane (A) is involved in the transmission of sound waves from the outer ear to the middle ear. The otolith organs (C) are responsible for detecting changes in head position and linear acceleration, but not sound waves. The pinna (D) helps to collect sound waves and direct them into the ear canal, but does not play a role in converting sound energy into nerve impulses.

Question 4

The eardrum is linked with the cochlea by the

Accepted Answer

The auditory ossicles (malleus, incus, and stapes) connect the eardrum to the cochlea in the inner ear, and transmit sound vibrations from the eardrum to the oval window, which leads to the fluid-filled cochlea. The stereocilia, auditory nerve, and organ of Corti are all structures located within the cochlea itself.

Question 5

Which of the following is a membrane on the cochlea that is attached to the stapes and moves back and forth, making waves in the fluid inside the cochlea?

Accepted Answer

The membrane that is attached to the stapes and moves back and forth, making waves in the fluid inside the cochlea is the oval window. The tympanic membrane is also known as the eardrum and is located at the entrance to the ear canal, the auditory ossicles are a group of three bones in the middle ear that transmit vibrations from the eardrum to the inner ear, and the pinna is the visible part of the outer ear that gathers sound waves.

Question 6

Sound vibrations make waves in the fluid inside the cochlea.These waves in the fluid are detected in the cochlea by

Accepted Answer

The waves in the fluid inside the cochlea are detected by hair cells. Ossicles are three tiny bones in the middle ear that transmit vibrations from the eardrum to the inner ear. Pinnas are external structures of the ear that help collect sound waves. Umami cells are taste receptors on the tongue that detect the taste of umami, one of the five basic tastes.

Question 7

Grandma told the grandkids that their "PaPa" was right about the "little hammer and other things" being in their heads.She then added that their inner ears look like snails.This fluid-filled structure that looks like a snail is the

Accepted Answer

The inner ear structure that looks like a snail is the cochlea. This is where sound waves are converted into neural signals that the brain can interpret. The pinna is the external part of the ear that helps to collect sound waves. The auditory ossicles are three small bones in the middle ear that help to amplify sound. Umami is a taste sensation, not related to hearing.

Question 8

According to which theory of hearing will an 800-hertz tone produce 800 nerve impulses per second through the auditory nerve?

Accepted Answer

According to the frequency theory of hearing, the rate of nerve impulses traveling up the auditory nerve matches the frequency of a tone, meaning that an 800-hertz tone will produce 800 nerve impulses per second through the auditory nerve.

Question 9

Which theory of hearing explains that hearing high or low tones depends upon which area of the cochlea is more strongly stimulated?

Accepted Answer

The place theory explains that hearing high or low tones depends upon which area of the cochlea is more strongly stimulated. The different areas of the cochlea are tuned to different frequencies, and the brain determines pitch by interpreting the location on the cochlea that is stimulated.

Question 10

The cochlea is made up of the

Accepted Answer

The cochlea is a spiral-shaped organ in the inner ear that is responsible for converting sound waves into electrical impulses that can be interpreted by the brain. It is made up of several structures, including the organ of Corti, which contains hair cells and stereocilia that detect sound vibrations. The malleus, incus, and stapes are part of the auditory ossicles in the middle ear, while the rods and cones are part of the retina in the eye. The pinna is the external part of the ear that helps to funnel sound waves into the ear canal.

Question 11

Which of the following is the center part of the cochlea and contains the hair cells?

Accepted Answer

The organ of Corti is the center part of the cochlea and contains the hair cells. The ossicles are small bones in the ear that transmit sound vibrations. The pinna is the visible part of the ear outside the head. The Ishihara nodule is not a structure found in the ear.

Question 12

Grandpa teased his grandchildren by saying that they have little hammers, anvils, and stirrups in their heads.They hollered, "No, you're wrong, PaPa." However, their grandpa was right, since these are the common names for the

Accepted Answer

The auditory ossicles, which are located in the middle ear, consist of three small bones: the malleus (hammer), incus (anvil), and stapes (stirrup). These bones work together to transmit sound waves from the eardrum to the inner ear. Grandpa was using a playful way to refer to these structures.

Question 13

Which theory of hearing explains how sounds up to 4,000 hertz reach the brain?

Accepted Answer

The frequency theory of hearing explains how the rate at which nerve impulses are sent to the brain matches the frequency of a sound, allowing us to detect sounds up to 4,000 hertz.

Question 14

Which of the following are part of the organ of Corti and when bent trigger nerve impulses, which flow to the brain?

Accepted Answer

Stereocilia are hair-like structures that are part of the organ of Corti in the inner ear. When they are bent, they trigger nerve impulses that flow to the brain. The ossicles (including the stapes) are part of the middle ear, not the inner ear, and the pinna is the visible part of the outer ear.

Question 15

As the pitch rises, nerve impulses of this same pitch will flow into the auditory nerve, according to the __________ theory.

Accepted Answer

The frequency theory proposes that the pitch of a sound is determined by the frequency of the nerve impulses that travel up the auditory nerve to the brain. As the pitch of the sound rises, so does the frequency of the nerve impulses. Therefore, choice B, frequency, is the best answer.

Question 16

The hair cells of the cochlea serve a function in hearing that is similar to the function of which of the following in vision?

Accepted Answer

The hair cells in the cochlea are responsible for transducing sound waves into electrical signals that can be interpreted by the brain. Similarly, the rods and cones in the retina of the eye are responsible for transducing light waves into electrical signals that can be interpreted by the brain.

Question 17

In the measurement of sound, the number of vibrations per second is called a(n)

Accepted Answer

The number of vibrations per second is called frequency, which is measured in Hertz (Hz). Therefore, A is the correct choice. Decibel (dB) measures the intensity or loudness of sound, ampere (A) measures electric current, and ohm (Ω) measures electrical resistance.

Question 18

The three auditory ossicles are the malleus, incus, and the

Accepted Answer

The three auditory ossicles are the malleus, incus, and the stapes.

Question 19

The final step (within the inner ear)that is required to convert vibrations into sound sensations involves the movement of the

Accepted Answer

The final step within the inner ear that is required to convert vibrations into sound sensations involves the movement of hair cells. The hair cells are sensory receptor cells that are located in the cochlea and are responsible for converting mechanical sound vibrations into neural signals that are sent to the brain for processing.

Question 20

The three small bones of the middle ear are called the

Accepted Answer

The three small bones of the middle ear are commonly referred to as the auditory ossicles.

Quiz 4: Sensation and Perception.