ch 19
Olfaction is also known as ______.
smell
Which of the following are true of the olfactory hairs?
They are unmyelinated. They are immobile.
Which of the following are true of rods?
They function well in dim light
The tympanic cavity is filled with ______.
air
Olfactory receptor cells are ______ neurons.
bipolar
Perilymph is similar to ______ and endolymph is similar to ______.
cerebrospinal fluid, intracellular fluid
The ciliary body is composed of ______.
ciliary muscles and ciliary processes
The optic disc is associated with ______.
cranial nerve II
If a receptor acts as a transducer in the body, it transforms one type of energy into ______, which is conducted along a sensory neuron.
electrical energy
Cutaneous receptors are a type of ______.
exteroceptors
The sclera ______.
is made of dense connective tissue
Axons of olfactory receptor cells form fascicles in the ______.
olfactory nerve
Free nerve endings primarily detect ______.
pain and temperature
Conscious awareness of incoming sensory information is called ______.
sensation
The ciliary muscles are made of ______.
smooth muscle
Changes in the external and internal environment are called ______.
stimuli
The ______ ligaments connect the ciliary body to the lens.
suspensory
Neurons in the olfactory bulb travel through the olfactory ______ to the brain.
tract
There are five basic taste sensations and ______ different primary odors.
8
Which is true of the cornea?
Avascular
What is the largest structure of the vascular tunic?
Choroid
What structure is filled with pigment from melanocytes?
Choroid
Which are activated by high-intensity light?
Cones
What is another name for the ear drum?
Tympanic membrane
Which taste sensation has been described as "chicken-soup-like"?
Umami
What is the name of the "snail-shaped" structure?
cochlea
The limbus is the junction between the sclera and ______.
cornea
Free nerve endings are terminal branches of ______.
dendrites
What is the name of the outermost layer of the eye?
fibrous
Which of the following are functions of the inner ear?
Hearing
The diameter of a normal eye is about ______ in diameter.
2.5 centimeters
______ of the eye is receded into the orbit.
80%
Which type of receptors do not exhibit adaptation?
Bulbous corpuscles
Which cranial nerve innervates the posterior 1/3 of the tongue?
CN IX
What type of receptor is found in the mucous membranes?
Exteroceptors
The olfactory nerve is cranial nerve number ______.
I
Where are the photoreceptors located?
In the neural layer of the retina
What structure creates the "blind spot"?
Optic disc
Which fibers cross at the optic chiasm?
Optic nerve axons from the medial region of the retina
What structure is the "white" of the eye?
Sclera
The cartilaginous portion of the external ear is called the ______.
auricle
What structure transforms one type of energy into a different type of energy?
Transducers
Which are basic taste sensations?
Umami Sweet Sour
Which layer of the eye contains the blood and lymph vessels?
Vascular tunic
The iris is continuous with the ______.
ciliary body
Where is the cochlea located?
inner ear
Endolymph has a ______ sodium and ______ potassium concentration.
low, high
Camphorous, fishy, malty, minty, musky and sweaty are examples of ______.
primary odors
Which of the following are correct names for the tube that connects the middle ear to the nasopharynx?
Pharyngotympanic tube Eustachian tube Auditory tube
What structure makes up the posterior portion of the fibrous tunic?
Sclera
The ______, the black hole in the eye, is surrounded by the colorful ______.
pupil, lens
Which of the following are a part of the fibrous tunic?
Sclera Cornea
Which of the following structures contain exteroceptors?
Skin
Where are tactile corpuscles located?
Skin of lips
What type of muscle is found in the iris?
Smooth
The inner ear is located in the ______ bone.
temporal
The primary olfactory cortex is located in the ______ lobe of the cerebrum.
temporal
