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human senses 1

QuestionAnswer
______and _________ help to keep debris out of the eyeball and prevent drying. eyelids and eyelashes
lining the inside of the eyelids and covering the white anterior surface of the eye is a thin, transparent layer known as the _____ conjunctiva
this layer becomes red when inflamed and is responsible for the condition known as pinkeye. conjunctiva
located laterally under the superior lid of the eye, produces tears which help to wash out the debris and prevent the eye from drying out. lacrimal gland
the tears flow over the surface of the eye to the region of the medial canthus and drains into the______ lacrimal duct
the______ is composed of portions of the frontal, lacrimal, zygomatic, ethmoid, and sphenoid bones and the maxilla. bony orbit
skeletal eye muscles attached to the outer surface of the eyeball, assist the movement of the eyeball within the bony orbit. this allows you to look at something without have to turn your head. these muscles are controlled by the 3,4,&6th cranial nerves extrinsic eye muscles
the outermost layer, the fibrous tunic, of the eyeball consists of thick fibrous structures which are designed to prevent puncturing and protect the internal eye structures. (info)
the_____ is the white layer which surrounds the back, sides, and a portion of the front of the eyeball. sclera
the____ is the clear, window-like structure at the front of the eye cornea
beneath the cornea layer are the structures of the vascular tunic, which includes the choroid, iris, and ciliary body. (info)
the____has a very good blood supply and contains pigment which assists the eye eliminating light rays which have already been seen by the eye. choroid
the____ is the colored portion at the front of the eye. the color of the iris is genetically programmed. iris
at the center of the iris is a hole, the____ pupil
the iris can change the size of the pupil to control the amount of light entering the eye. this structure is controlled by the occulomotor nerve. (info on pupil)
the___lies posterior to the iris. ciliary body
tiny fibers extend from the ciliary body to the clear, flexible____, allowing the ciliary body to control focusing by adjusting the shape of the lens. ciliary body is also controlled by the lens lens
the innermost layer, the neural tunic, of the eyeball is composed of the___ retina
are nerve receptors that detect light, are located in the retina. these photoreceptors come in two varieties, rods & cones, photoreceptors
is the area of the retina where you have no vision at all. optic disc
there are no photoreceptors in this area because this is the beginning of the___. this area is easy to identify because a large vascular network emerges from the center of this structure and then spreads out to supply the rest of the retina. optic nerve
the_____ is the area of the retina where you have the best vision and contains a huge component of cone-type photoreceptors. this is located directly opposite the pupil, just lateral to the optic disc. No blood vessels are found in this immediate region. macula lutea
in the condition known as macular degeneration, the photoreceptors are lost from the macula region. (info on macula lutea)
the space at the back of the eye between the lens and the retina is referred to as the_____ posterior cavity
the (space) posterior cavity contains a gelatinous mass called the___ vitreous body
the vitreous body helps hold the retina in place, since the retina is only secured at the optic disc. (info on vitreous body)
the vitreous body helps hold the retina in place, since the retina is only secured at the optic disc. (info on vitreous body)
the space at the front of the eye between the lens and the cornea is called the____. aqueous humor.
too much of this aqueous humor can cause a condition known as glaucoma. (info on aqueous humor)
the anterior cavity is further subdivided into the ____ anterior chamber & posterior chamber
is between the cornea and the iris anterior chamber
is between the iris and lens posterior chamber
the ear can be divided into the regions: external, middle, and internal
the ______ is the part design to be directly exposed to the environment. external ear
the flexible, flesh-colored piece of cartilage called the ??? is the portion of the ear which is visible from the outside. pinna
at the end of the external auditory canal is the ??? which serves as the barrier between the external and middle ear regions. this flexible sheet of dense collagenous connective tissue vibrates when the sound waves come in contact with it. tympanic membrane
the____ connects to the middle ear to the throat region. this tube helps regulate the air pressures on the tympanic membrane. unfortunately, this also creates a passageway for organisms which cause infections to get into the middle ear. eustachian tube
the ___ is indirectly exposed to the environment middle ear
the____ connects to the middle ear to the throat region. this tube helps regulate the air pressures on the tympanic membrane. unfortunately, this also creates a passageway for organisms which cause infections to get into the middle ear. eustachian tube
also in the middle ear are three tiny bones, the____? ear ossicles
the 3 tiny bones that are also called ear ossicles is are? the ossicles help to conduct the sound waves to the structures of the inner ear. malleus, incus, and stapes.
the 3 tiny bones that are also called ear ossicles is are? the ossicles help to conduct the sound waves to the structures of the inner ear. malleus, incus, and stapes.
the ____ is isolated from the external environment and contains several sets of nerve receptors, each involved with a different special sense activity. inner ear
the____ resembles a snail's shell. cochlea
cochlea contains receptors for hearing known as the?? organs of corti
the____ consist of 3 rings oriented in different directions. semicircular canals
the____ consist of 3 rings oriented in different directions. semicircular canals
the semicircular canals contain receptors that are associated with ??? which helps the brain know the direction and speed of head motion dynamic equilibrium
the semicircular canals contain receptors that are associated with ??? which helps the brain know the direction and speed of head motion dynamic equilibrium
the____is a connecting area between the cochlea and the semicircular canals. vestibule
within the vestibule are the ___and ___ utricle and saccule
within the vestibule are the ___and ___ utricle and saccule
the ____ helps the brain determine the position of the head which is not moving. static equilibrium
on the wall of the vestibule are 2 membranes associate with the inner ear, the ____ and _____ oval and round window
this serves as the entrance to the cochlea, allowing sound waves to enter into the inner ear structures. oval window
this serves as the entrance to the cochlea, allowing sound waves to enter into the inner ear structures. oval window
this serves as the exit from the cochlea, dissipating sound waves that have already passed through organs of corti. round window
this serves as the exit from the cochlea, dissipating sound waves that have already passed through organs of corti. round window
this nerve conducts impulses associated with hearing and equilibrium to the brain for interpretation. vestibulocochlear nerve.
this nerve conducts impulses associated with hearing and equilibrium to the brain for interpretation. vestibulocochlear nerve.
is the part of the brain which controls the activities of many other endocrine organs. you looked at this structure on the ventral surface of the brain in a lab earlier in the semester. hypothalamus
is the part of the brain which controls the activities of many other endocrine organs. you looked at this structure on the ventral surface of the brain in a lab earlier in the semester. hypothalamus
is the round ball that hangs by a thin band just inferior to the hypothalamus. the pituitary gland lies within the sella turcica of the sphenoid bone when the brain is positioned within the skull. pituitary gland
lies in the anterior cervical region, about midway down the throat. this organ cannot be detected by touching. thyroid gland
is also found in the brain tissue, is not well understood, but is known to produce at least one hormonal substance. pineal gland
lies in the anterior cervical region, about midway down the throat. this organ cannot be detected by touching. thyroid gland
on the posterior surface of the thyroid gland, four small ____ can be seen parathyroid glands
immediately anterior to the great vessels of the heart, located in the thorax is the?? this gland plays an important role in the info of certain varieties of white blood cells. by adulthood most of this structure has shrunken. thymus
lies in the mid-abdomen, just posterior and inferior to the stomach. this is an unusual gland b/c it contains both exocrine glands, which form digestive secretions and endocrine glands, forming several hormones controlling blood sugar levels. pancreas
immediately superior to the kidneys, in the posterior abdomen, are the ?? adrenal glands
the adrenal glands(triangular shape organs) have a central region known as the ??? adrenal medulla
the adrenal glands also have an outer crust referred to as the ?? adrenal cortex
the final two of the major endocrine glands are located in the reproductive system, ____ ovaries and testes
in the female, these are located in the posterior region of the border between the pelvic and abdominal cavities. ovaries
in the male, these are located outside of the ventral cavity within the scrotal sac. testes
Created by: a.quimbaya1