chap 16
Hearing and equilibrium are transmitted along which cranial nerve?
V111
Receptors of the human body convert stimulus energy into ______.
an electrical signal
Which cavity of the eyeball is divided into an anterior and posterior chamber?
anterior cavity
When the ______ membrane moves, the _______ on the spiral organ hair cells distort because they are anchored by the tectorial membrane.
basilar ; stereocillia
Gustatory cells are found in taste
buds
Gustatory cells are
chemoreceptors
What is the largest structure of the vascular tunic?
choroid
Which structure of the eye absorbs light to prevent it from scattering within the eye?
choroid
The auditory sensory axons of the _____ branch of cranial nerve number ______ terminate in the cochlear nucleus within the brainstem.
cochlear ; 8
What type of photoreceptors detects color
cones
When you go from a bright light environment to a dark environment, you have a slow sensitivity to low light levels. This is called
dark adaptation
Light rays are refracted or bent when they pass through two media of different ______.
densities
The outmost layer of the eye is called the ______ tunic.
fibrous
Optic tracts ultimately are directed to the primary visual cortex in the ______ lobe
occipital
The iris controls the size of the _____
pupil
The black hole in the eye is called ________the and it is surrounded by the colorful _________. Listen to the complete question
pupil, iris
Most of the eye is ______ the orbit of the skull.
receded into
The area that a receptor cell gathers information from is called the ___
receptive field
Some individuals experience pain in their left shoulder during a heart attack. This is an example of ______.
referred pain
What structure is the "white" of the eye?
sclera
What structure makes up the posterior 5/6 of the fibrous tunic? Multiple choice question.
sclera
Which part of the eye is an attachment site for extrinsic eye muscles?
sclera
What is the most numerous type of receptor?
tactile receptors
The cornea is ______.
transparent
Which layer of the eye contains the blood and lymph vessels?
vascular tunic
Which are true of rods?
-They function well in dim light. -There are more than 100 million rod cells per eye.
Optic tracts extend to which structures after they leave the optic chiasm
-superior colliculi -the lateral geniculate nucleus of the thalamus
Place the structures of the vascular tunic in order from anterior to posterior.
1. iris 2. ciliary body 3. choroid
Order these structures from superficial to deep. Start with the outermost structure first.
1. sclera 2. choroid 3. pigmented layer of retina 4. neural layer of retina
As we adjust to low light, our ______ becomes nonfunctional and it may take ______ for rhodopsin to become regenerated sufficiently so that you can see well in low-light conditions.
cones ; 20-30 minutes
The limbus is the junction between the sclera and the
cornea
Which are a part of the fibrous tunic?
cornea and sclera
True or false: The eye is spherical, measuring about 5 centimeters in diameter, and most of it is receded into the orbit of the skull.
false, the eye is 2.5 cm
The outmost layer of the eye is called the
fibrous tunic
Pain is an example of a ______ sense
general
The term equilibrium refers to our awareness and monitoring of our position.
head
The vestibulocochlear nerve transmits ______ information.
hearing and equilibrium
The retina is the ______ layer of the eye wall
internal
The retina is the ______ layer of the eye wall.
internal
The sense of smell is called ___
olfaction
We use the sense of to sample our environment for information about the food we will eat, the presence of other individuals in the room, or potential danger. Listen to the complete question
olfaction
The fat surrounding the eye is called
orbital fat
Olfactory receptors ___
perceive odors
What type of receptor can undergo adaptation?
phasic
If stimulated over a period of time, _______ receptors lose eventually sensitivity.
phasic or adapting
____ occurs when impulses from an organ are perceived as originating from the skin.
referred pain
Receptors for general senses are distributed throughout the ______ and viscera.
skin
Localization and sensitivity are easily determined in a ______ receptive field.
small
The apparent distortion of the spoon in the water glass is due to the phenomenon called .
refraction
Sensory receptors in which structures help monitor and adjust our equilibrium?
saccule utricle semicircular ducts
Mechanoreceptors located in the skin and mucous membranes are called ______ receptors.
tactile
What is the name of structure A in the picture of the spiral organ
tectorial membrane
The middle and inner ear are in which bone?
temporal bone
What chamber is between the iris and cornea?
anterior chamber
