Question 1

The hearing receptors are located in the

Accepted Answer

The cochlear duct is where the hearing receptors, called hair cells, are located. The utricle, saccule, and semicircular canals are involved in sensing balance and acceleration, not hearing. The ampulla is a swelling at the end of each semicircular canal that contains hair cells involved in detecting rotational movement.

Question 2

Receptors in the ________ provide sensations of gravity and linear acceleration.

Accepted Answer

The vestibule contains the utricle and saccule, which are responsible for detecting changes in linear acceleration and gravity. They are able to detect the position and orientation of the head in space. The other choices are involved in hearing and transmitting sound waves.

Question 3

Sound energy is converted into mechanical movements by the

Accepted Answer

Sound energy is first captured by the tympanic membrane (eardrum), which is then converted into mechanical movements that are transmitted to the auditory ossicles, including the malleus, incus, and stapes. The movement of the stapes against the oval window, which separates the middle ear from the inner ear, then generates fluid waves in the cochlea, where sound energy is finally transformed into neural signals that can be interpreted by the brain.

Question 4

Your young child has a middle ear infection: otitis media. There is a build-up of fluid, bacteria, and white blood cells, or pus, inside of the middle ear chamber. Why has this affected the child's hearing?

Accepted Answer

The auditory ossicles, which consist of the malleus, incus, and stapes, transmit sound waves from the tympanic membrane to the oval window of the inner ear. When there is a build-up of fluid, bacteria, or pus in the middle ear, it can prevent the ossicles from vibrating freely, resulting in a conductive hearing loss. This means that sound waves cannot be efficiently transmitted to the inner ear, leading to a reduction in hearing ability.

Question 5

The sense of hearing is provided by receptors of the

Accepted Answer

The receptors responsible for hearing are located in the internal ear, specifically in the spiral-shaped cochlea. The outer ear (including the pinna) and the middle ear are involved in transmitting sound waves to the internal ear, but do not contain the actual receptors for hearing. The semicircular canals are involved in balance, not hearing.

Question 6

The branch of the cranial nerve that is responsible for monitoring changes in equilibrium is the ________ branch.

Accepted Answer

The vestibular branch of the cranial nerve is responsible for monitoring changes in equilibrium, including detecting head position, linear acceleration, and rotational movements. The other options listed, such as the cochlear branch (responsible for hearing) and the trigeminal branch (responsible for sensation in the face), are not related to equilibrium.

Question 7

You notice that your father holds his book farther from his face than he used to. Since you are taking an anatomy and physiology course, you realize that this is due to

Accepted Answer

The ability of the lens to change its shape, or accommodate, for near or far vision is gradually lost with age. This condition is called presbyopia. As a result, people will hold objects, such as books or phones, farther away in order to see them more clearly. Cataracts, a lack of vitreous humor, or a tumor on the optic nerve would likely cause other visual symptoms in addition to difficulty focusing on near objects. Photoreceptor sensitivity also typically diminishes with age, but would not cause specifically difficulty with close-up vision.

Question 8

The movement of the stapes at the oval window establishes pressure waves in the

Accepted Answer

The oval window separates the middle ear from the inner ear and when the stapes bone moves, it causes the oval window to vibrate, creating pressure waves in the fluids of the inner ear. The perilymph of the scala vestibuli, located next to the oval window, is the fluid that receives these pressure waves. The other options are not directly involved in receiving pressure waves from the movement of the stapes at the oval window.

Question 9

What do the receptors for hearing, static equilibrium, and dynamic equilibrium all have in common?

Accepted Answer

All of the receptors for hearing, static equilibrium, and dynamic equilibrium have stereocilia, which are specialized hair-like structures that respond to mechanical stimuli.

Question 10

The tympanic membrane vibrates to frequencies between

Accepted Answer

The tympanic membrane, or eardrum, vibrates in response to sound waves, and the human ear is generally capable of hearing frequencies between 20 Hz and 20,000 Hz. This range represents the limits of human hearing, from the lowest bass sounds to the highest frequencies that can be detected.

Question 11

The structure that separates the cochlear duct from the scala tympani is the

Accepted Answer

The basilar membrane separates the cochlear duct (scala media) from the scala tympani in the cochlea. It plays a crucial role in the mechanics of hearing by supporting the organ of Corti, where sound vibrations are converted into neural signals.

Question 12

Your five-year-old daughter's teacher says that your child has been having problems seeing the whiteboard in the classroom. The doctor checks and diagnoses her with myopia. Does this problem have to do with a cloudiness of the lens, pressure problems, or the length of the eyeball? Pick one of the choices, explain the problem, and describe the treatment.

Accepted Answer

The answer of Your five-year-old daughter's teacher says that your...

Question 13

The structure that overlies the spiral organ, and which is firmly attached to the walls of the cochlear duct, is the

Accepted Answer

The structure that overlies the spiral organ is the tectorial membrane, which is firmly attached to the walls of the cochlear duct. The basilar membrane is located beneath the spiral organ and vibrates in response to sound waves. Endolymph is the fluid within the cochlear duct that bathes the hair cells of the spiral organ. The malleus is one of the three tiny bones in the middle ear that transmit vibrations from the eardrum to the inner ear. The vestibular duct is another name for the scala vestibuli, which is one of the three ducts within the cochlea.

Question 14

Movement of the sensory receptors in the ampullae of the semicircular canals

Accepted Answer

The sensory receptors in the ampullae of the semicircular canals are responsible for detecting rotational movement. When these receptors move in response to rotational acceleration, they stimulate the hair cells within them, which sends signals to the brain to alert us of the movement. This is why we can feel dizzy or disoriented when spinning rapidly or experiencing sudden changes in movement.

Question 15

________ deafness results from conditions in the middle ear that block the normal transfer of vibrations from the tympanic membrane to the oval window.

Accepted Answer

Conduction deafness refers to hearing loss caused by an obstruction or damage to the ear's mechanical system that conducts sound waves to the inner ear. This can include issues with the middle ear such as a buildup of earwax, fluid in the middle ear, or damage to the ossicles (small bones). Nerve deafness (A) refers to hearing loss caused by damage to the inner ear or the auditory nerve, and cochlear deafness (E) specifically refers to hearing loss caused by damage to the cochlea. Corti (B) and tunnel (D) do not relate to types of hearing loss.

Question 16

Tom recently had surgery to remove some polyps (growths) from his sinuses. After he heals from the surgery, he notices that his sense of smell is not as keen as it was prior to the procedure. What is the reason for this side effect?

Accepted Answer

The answer of Tom recently had surgery to remove some...

Question 17

Your grandmother who lives in an assisted living facility is always complaining about how bad the food is. You eat there with her often and find the food to be cooked well and interesting, even though the food is not what you would really prefer. What is the most reasonable explanation for this?

Accepted Answer

As people age, they naturally lose gustatory cells in their taste buds, which can lead to a diminished ability to taste certain flavors. This could be why your grandmother is not able to fully appreciate the flavors of the food being served at the assisted living facility. It's also possible that certain medications, health conditions, or changes in her olfactory receptors could be contributing to her dislike of the food.

Question 18

The frequency of a sound is indicated to the nervous system by the

Accepted Answer

The basilar membrane of the spiral organ is highly specialized to vibrate at different frequencies along its length. Higher frequencies cause maximum displacement of the basilar membrane close to the base of the cochlea where it is narrow and stiff, whereas lower frequencies cause maximum displacement of the basilar membrane near the apex of the cochlea where it is wider and more flexible. Thus, the region of the basilar membrane that is stimulated sends frequency information to the auditory nerve, which transmitted to the brain for interpretation.

Quiz 9: The General and Special Senses