The Sensory System

Ciliary muscle controls the lens' shape to allow for vision at near and far distances is known as?

Accommodation.

Drug that relieves pain is known as the?

Analgesic drug.

A drug most commonly use to prevent pain during surgery, and relieves chronic pain is known as?

Anesthetics.

Where do salty taste experienced?

Anterior sides of the tongue.

A natural ways o relieve pain are?

Application of heat or cold, relaxation or distraction techniques.

Constantly produced and drained from the eye is known as?

Aqueous humor.

Watery fluid that fills much of the eyeball anterior lens, helps maintain the cornea's slight forward curve is known as?

Aqueous humor.

What is the pinna also called as?

Auricle.

Receptors in the walls of the large arteries that monitor blood pressure known as?

Baroreceptors.

Receptors trigger response that control blood pressure as the vessel stretch is the?

Baroreceptors.

Lens have two bulging surfaces and is thus described as?

Bioconvex.

Skeleton of the inner ear is called the?

Bony labyrinth.

What are the classes of receptors?

Chemo, photo, thermo, and mechano.

The coat is composed of a delicate network of connective tissue interlaced with many blood vessels is known as the?

Choroid.

This coat contains much of the dark pigment.

Choroid.

Muscle shaped somewhat like a flattened ring with a central hole the size of the iris's outer edge is the?

Ciliary muscle.

Coiled like a snail shell and located towards the anterior is the?

Cochlea.

Division of the labyrinth that contains receptors for hearing is the?

Cochlea.

Membranous cochlea also called the?

Cochlear duct.

A thin membrane that lines the inner surface of the eyelids and covers with visible portion of the white of the eye is the?

Conjunctiva.

What are the refraction parts?

Cornea, aqueous humor, lens, and vitreous body.

Anterior continuation of the sclera is known as the?

Cornea.

Transparent and colorless, also referred to as the window of the eye.

Cornea.

Receptors located at base of the semicircular canal is known as the?

Cristae.

What do thermoreceptors respond to?

Detects change in temperature, located in the skin.

What does tympan/o mean?

Drum.

Body is spinning or moving in different directions is known as what kind of equilibrium?

Dynamic equilibrium.

What does ot/o mean?

Ear.

Within the membranous labyrinth, are filled with fluids called?

Endolymph.

Drug released naturally from certain brain regions and are associated with pain control is called?

Endorphin.

What does equi- mean?

Equal.

This tube opens to allow pressure to equalize on the two sides of the tympanic membrane is the?

Eustachian tube.

What connects the middle ear cavity with the throat?

Eustachian tube.

What does ophthalm/o mean?

Eye.

Edges of small, depressed areas are called?

Fissures.

Where are taste buds located?

Fissures.

Cones are localized at the retinal, especially in a tiny depressed area near the optic nerve called the?

Fovea centralis.

What are some of the sensory receptors?

Free dendrite, end-organ, and specialized cell associated with a afferent neuron.

Temperature receptors termed as?

Free-nerve endings.

Describe rods.

Functions in dim light, but do not provide sharp images. Cylindrical; about 120 million in each retina; pigments - rhodopsin; color perception - shades of gray.

Widely distributed throughout the body, is the?

General sense.

Sense of taste is termed as?

Gustation.

What does -cusis mean?

Hearing.

Handlelike part of the malleus is attached to the tympanic membrane, whereas the headlike part is connected to the second bone called the?

Incus.

Ear part which is the most complex and contains the sensory receptors for hearing and equilibrium is the?

Inner ear.

What does -scope mean?

Instrument for examination.

Colored or pigmented part of the eye is known as the?

Iris.

Sense of body movement is termed as?

Kinesthesia.

Ear's most complicated and important part is the internal portion which describe as the?

Labyrinth.

Tears produced by this gland, lubricates the eye and contain an enzyme that protects against infection is the?

Lacrimal gland.

Where do sour taste experienced?

Laterally on the tongue.

Clear, circular structure made of a firm, elastic material is known as the?

Lens.

Important in light refraction because it is elastic and its thickness can be adjusted to focus light for near/far vision.

Lens.

Technically called the crystalline lens is known as the?

Lens.

What do photoreceptors respond to?

Located in retina of eye, respond to light.

Fovea contain within a yellowish spot area that may show degenerative changes with age is known as the?

Macula lutea.

Each receptor is called a?

Macula.

What are the three bones of the ossicles?

Malleus, incus, and stapes.

The first bone is shaped like a hammer is called the?

Malleus.

What is another name for the external auditory canal?

Meatus.

Within the bony labyrinth, is an exact replica but made from membranes called?

Membranous labyrinth.

Ear part which is an air space containing three small bones is known as the?

Middle ear.

What does kine mean?

Movement.

Acts on CNS to alter perception and response to pain is a drug called?

Narcotics.

Tears flow into ducts near the eye's nasal corner where they drain into the nose but the way of?

Nasolacrimal duct.

Lack of Vitamin A, may have seeing in dim light, this is termed as?

Night blindness; lack of rhodopsin.

Catagory of analgesic drug, reduce inflammation and effective on mild or moderate pain is called?

Nonnarcotic analgesic.

Three nerve carry impulses to the eyeball muscle is the?

Oculomotor, trochlear, and abducens.

What does preby- mean?

Old.

Cranial nerve carries impulses of pain, touch and temperature from the eye and surrounding parts to the brain is known as?

Ophthalmic nerve.

Physician who specializes in treatment of the eye, examines the retina with an ophthalmoscope is called?

Ophthalmologist.

Important part of a medical examination is known as?

Ophthalmoscope.

What are two sensory nerves that supply the eye?

Optic and ophthalmic.

Consequently, no image can form on the retina at this point, which known as the blind spot called?

Optic disks.

Cranial nerve visual impulses from the retinal rods and cones to the brain is known as?

Optic nerve.

Organ of hearing is called the?

Organ of corti,

Middle ear cavity is a small, flattened space that contains three small bones called?

Ossicles.

The fluid above he hair cells contains small crystals of the calcium carbonate called?

Otoliths.

Ear part which includes an outer projection and a canal ending at a membrane is the?

Outer ear.

The ossicles amplify these vibrations and finally transmit them from the stapes to a membrane covering this of the inner ear is the?

Oval window.

What does propri/o mean?

Own.

What does -alges/i mean?

Pain.

What is the most protective sense?

Pain.

All three divisions of the bony labyrinth contains a fluid called?

Perilymph.

External portion of the ear consist of visible projecting portions known as the?

Pinna and the external auditory canal.

Where do bitter taste experienced?

Posterior part of the tongue.

With aging, the lens loses elasticity and therefore its ability to accommodate for near vision, become difficult to focus clearly on close objects, is a condition called?

Presbyopia.

What are the general senses?

Pressure, temperature, pain, touch, and position.

Receptors aid in position by the internal ear's equilibrium receptors is known as?

Proprioreceptors.

If the muscle becomes weaker with age, the eyelids may droop and interfere with vision, called?

Ptosis.

Muscle fibers that governs the size of the iris's central opening is known as the?

Pupil.

Bending of the light rays as they pass from one substance to another substance of different density is known as the?

Refraction.

What do mechanoreceptors respond to?

Responds to movement.

Eye's actual receptor layer is known as the?

Retina.

Sound waves ultimately leave the ear through another membrane-covered space in the bony labyrinth in the?

Round window.

List from outer to inner, the tunics of the eyeball.

Sclera, choroid, and retina.

Commonly referred to as the white of the eye is known as the?

Sclera.

Division of the labyrinth contain areas at the bases of the semicircular canals also contain receptors for equilibrium is the?

Semicircular canal.

Division of the labyrinth that contain three projecting bony tubes located towards the posterior is the?

Semicircular canal.

What does -esthesia mean?

Sensation.

When sensory receptors are exposed to a continuous stimulus, receptors often adjust themselves so that the sensation becomes less acute is known as?

Sensory adaptation.

The part of the nervous system that detects a stimulus is the?

Sensory receptor.

What structures protects the eyes?

Skull bones, upper/lower eyelids, eyelashes, eyebrows, conjunctiva, and lacrimal glands.

Localized in a special sense organ, is the?

Special sense.

Innermost ossicle is shaped somewhat like the stirrup of a saddle called?

Stapes.

Receptors located in the vestibule's two small chambers sense the position of the head or the position of the body when moving vehicle or when tilting head is knwn as what equilibrium?

Static equilibrium.

What does lith mean?

Stone.

What does nacro/o mean?

Stupor.

What are the six extrinsic muscles?

Superior rectus, lateral rectus, superior oblique, inferior rectus, Inferior oblique, and sclera.

Project from the ciliary muscle to the edge of the lens around the entire circumference is known as the?

Suspensory ligaments.

The ciliary muscle holds the lens in place by the means of filaments called?

Suspensory ligaments.

Touch receptors as termed?

Tactile corpuscles.

What do chemoreceptors respond to?

Taste and smell, detects chemicals int he solution.

Taste receptors are termed?

Taste buds.

Tiny, hairlike cilia on the receptor cells begin to move back and forth against this memebrane.

Tectorial membrane.

What is the tympanic membrane also referred to as?

The eardrum.

Any receptor must receive a stimulus of adequate, intensity, that is, at least a?

Threshold stimulus.

In order to respond and generate a nerve impulse, it needs to be a?

Threshold stimulus.

Where do sweet taste experienced?

Tip of the tongue.

How are receptors classified?

Type of stimulus it responds to, and distribution of their receptors.

Pungent or savory taste based on a response to the amino acid glutamate is called?

Umami.

What are the three divisions of the bony labyrinth?

Vestibule, semicircular canal, and the cochlea.

Division of the labyrinth consist of two bony chambers that contain some of the receptors for equilibrium is the?

Vestibule.

What are the special senses?

Vision, hearing, equilibrium, taste, and smell.

Important in maintaining the shape of the eyeball as well as in aiding in refraction is the?

Vitreous body.

Soft, jellylike substance that fills the entire space posterior to the lens is the?

Vitreous body.

What does lute/o mean?

Yellow.