Ch. 12

True

A difference between the chemoreceptors for taste and smell is that the receptors for smell are located on olfactory receptor cells, which are true sensory neurons.

Both B (result in activation of more receptors) and C (result in more frequent action potentials)

A more powerful stimulus will:

True

Accommodation refers to the adjustment of the lens curvature by the ciliary muscle when you focus on near or far objects.

The mallus, incus, and/ or stapes

Conduction deafness would most likely be caused by damage to:

are sensory neurons

Olfactory cells ________.

True

Otoliths within the vestibule are important in sensing head position.

Sensory neurons stop sending action potentials

Receptor adaptation results when:

True

Somatic sensations originate from receptors that are present in more than one location in the body.

They adapt very quickly

What do receptors in the skin for light touch and the receptors in the nose for smell have in common?

It connects the middle ear to the pharynx and allows equalization of air pressure.

What is the purpose of the auditory tube?

The macula

When we adjust our head and eye position to carefully look at something we are directing the image to focus on:

receptor adaptation

When you jump into cold water, it takes you a short while to acclimate and "get used to it." This is due to a reduction in sensory activity called ________.

Both A (Myopia) and C (Hyperopia)

Which of the following can be corrected with corrective lenses?

The cochlea

Different pitched sounds will result in stimulation of receptors located in different regions of:

True

Glaucoma is most often an insidious, chronic disease, with slowly developing symptoms.

False

In order to taste, smell, and hear, the body must convert a chemical stimulus into an action potential.

Auditory canal- tympanic membrane- malleus- cochlea- cochlear nerve

In what order do the structures of the ear come into play when hearing?

False

People with red-green color blindness are deficient in either red cones or green rods.

True

Receptors are classified according to the type of stimulus energy they convert.

semicircular canals.

Rotational movement of the head is sensed by the ________.

False

Some sensory receptors are the result of adaptations of the axons of sensory neurons.

True

Taste buds contain taste cells that convert chemical signals into action potentials.

frequency

The central nervous system interprets impulses based on their origin and ________.

False

The cochlea contains receptors that convert stimuli of movement and body position for the sense of balance.

False

The five different taste qualities are each located in a separate region of the tongue.

False

The fovea is the area at the back of the eye where the optic nerve exits.

to generate nerve impulses (action potentials) for hearing and equilibrium

The function of the inner ear is to ________.

cataracts

The lens of the eye becomes opaque with ________.

False

The middle ear consists of the cochlea and vestibular apparatus.

True

The most common cause of retinal detachment is a blow to the head.

the ability to focus a sharp image onto the retina

The shape of the eyeball may affect ________.

mechanoreceptors in the skin responsible for tactile sensations

What type of structures are Merkel discs, Ruffini endings, and Pacinian corpuscles?

It is the optic disc on the retina, where the optic nerve exits the eyeball.

Which best describes the "blind spot" on the retina of the eye?

mechanoreceptors

Which kind of receptors are found in the ear and detect sound, head position, acceleration, and rotational movement?

Chemoreceptors

Which of the following are NOT found among the somatosensory receptors?

Cones are more highly concentrated in the fovea centralis

Which of the following correctly describes the distribution of rods and cones in the retina?

Cornea- aqueous humor- pupil- lens- vitreous humor- retina

Which of the following correctly traces the path of light through the eye?

Loss of vision is temporary.

Which of the following is NOT involved in undetected, chronic glaucoma?

light touch

Which of the following is not a special sense?

Both A ( lens) and C ( Cornea)

Which of the following is/ are involved in focusing light?

pain receptors

Which of the following receptors is least likely to demonstrate receptor adaptation?

Many rods converge on a single ganglion

Which of the following statements explains why vision is less sharp in dim light than in bright light?

the aqueous humor

Which of the following structures found in the eye nourishes and cushions the cornea and lens?

The Iris

Which of the following will regulate the amount of light entering the eye?

Otitis Media

Which of the following would most readily be treated with antibiotics?