In which of the following structures would you expect to see afferent ganglia?
Which pathways compose the autonomic nervous system?
B and C
Which of the following best describes the effect on the heart of neurotransmitters released from the postganglionic neurons of B and C?
B would increase heart rate, while C would decrease it.
The circular structures shown within pathways B and C represent which of the following?
Which of the following releases the neurotransmitter norepinephrine?
terminus of a sympathetic postganglionic neuron
The synapse in pathway B has several possible locations. Which of the following is NOT a possible location?
the spinal cord
Which of the following is a way in which the somatic and autonomic nervous systems are similar?
None of the listed responses is correct.
Where are ganglia of the parasympathetic division located?
in or near effector organs
Outflow of the sympathetic division occurs from which regions of the CNS?
thoracic and lumbar
Which organ receives major input from the sympathetic, but not parasympathetic, division?
Which of the letters in the figure indicates the vagus nerve?
The group of fibers indicated by E represents which of the following?
white rami communicantes
Which of the following statements is true of the group of fibers indicated by the letter D?
D indicates fibers that bypass collateral ganglia and terminate within the adrenal gland.
Which of the following is NOT an autonomic nervous system (ANS) function?
reflex of skeletal muscle
Which of the following is NOT associated with the parasympathetic division of the autonomic nervous system (ANS)?
Which of these activities is most likely driven by parasympathetic innervation?
resting and digesting
Which division of the nervous system has long preganglionic neurons?
Which target organ is NOT affected by the parasympathetic division of the autonomic nervous system (ANS)?
Which plexus does NOT receive innervation from the vagus nerve?
inferior hypogastric plexus
Which of the following is NOT a designation for sympathetic ganglia?
Which set of details correctly identifies a series of events in a sympathetic pathway?
thoracolumbar origin, short preganglionic fiber, ACh release at ganglion, long postganglionic fiber, NE release at effector
Once a preganglionic axon reaches a trunk ganglion, one of three things can happen to the axon. Which of the following is NOT one of these three things?
The axon can course back into the spinal cord to synapse with preganglionic neurons in a different spinal segment.
Which description is NOT consistent with the sympathetic division?
most innervation from the vagus nerve
Unlike the sympathetic division, the parasympathetic division synapses with the adrenal medulla.
The sympathetic division innervates targets with nerves that all originate from the thoracolumbar region.
What differentiates an autonomic reflex from a somatic reflex?
a two-neuron motor pathway
The major anatomic difference in autonomic reflex arcs is that there are two sensory afferents.
Which of the following is an effect of norepinephrine binding to beta 2 adrenergic receptors?
The adrenal medulla secretes epinephrine during sympathetic stimulation. Which of the following statements describes why epinephrine would increase the sympathetic response?
The same receptors that respond to norepinephrine also respond to epinephrine, increasing the action of both.
Which receptor paring below is correct?
You are designing a drug to reduce heart rate. Which receptor would you target?
Symptoms of autonomic neuropathy could include any EXCEPT which of the following?
abnormal stretch reflex responses
Which of the following best demonstrates an example of cooperation of the parasympathetic and sympathetic nervous systems?
Parasympathetic stimulation causes vasodilation of blood vessels in the penis, leading to erection; sympathetic stimulation then causes ejaculation.
Which of the following target organs/systems is affected by the sympathetic nervous system but is NOT affected by the parasympathetic nervous system?
Which of the following is characteristic of the parasympathetic division?
stimulates secretory activity
Which of the following is responsible for the overall integration of the autonomic nervous system (ANS)?
Which of the following is responsible for the overall integration of the autonomic nervous system (ANS)?
If a chalazion interferes with glandular secretion, the immediate outcome would be ______.
friction on the anterior surface of the eye
Conjunctivitis does not directly affect ______.
the white of the eye
When a person’s cold is accompanied by “watery eyes,” there is reduced flow of lacrimal fluid directly into the ______.
Which of the following nerves would you predict is NEVER involved in the development of strabismus?
If retinal detachment occurs in the macula lutea, one can predict that there would be a significant loss of ______.
In glaucoma, damage occurs primarily to the ______.
ganglion cells in the retina
In theory, cataracts could be prevented by invention of a treatment that would ______.
increase diffusion rates within the lenses
Identify the muscle that is controlled by the abducens nerve (CN VI).
Identify the muscle responsible for depressing the eye and turning it laterally.
Name the muscle at D.
Which layer of the eye is indicated by letter A?
Identify the choroid.
Identify the layer that contains both a single-celled pigmented layer and a neural layer.
Identify the type of neuronal cell that detects bright light and provides high-resolution color vision.
Identify the type of neuron that would be secreting neurotransmitter in the light.
A and B
Identify the neuron that is last in the transmission pathway of light information, given the cells shown in this image.
Which accessory eye structure is NOT correctly matched with its function?
tarsal glands: produce tears
Which structure provides the vascular support for the eye?
What structure in the eye creates a visual blind spot?
Which of the following is a characteristic of the lens?
The lens focuses light on the retina.
Which structure is NOT matched with its function?
ciliary body: focus the pupil
You want to look up and to your right. Which extrinsic eye muscles would be the most active in each eye?
right eye: inferior oblique left eye: superior rectus
Aqueous humor forms during capillary filtration in the __________?
What is the portion of the eye that allows light to pass into the posterior chamber?
Which of the following statements is true?
Contraction of the ciliary muscles is required for hyperopic individuals to clearly see distant objects.
Atropine eye drops are used to temporarily paralyze the accommodation reflex and as a long-lasting pupil dilating agent, or mydriatic. What action causes the dilation effect?
blocked contraction of sphincter pupillae muscle
What term refers to the eye’s moving medially to track items close at hand?
During close vision, what actions must the eye take to bring an object into focus?
contract the ciliary body
This image best illustrates an eyeball that is __________.
As the ciliary muscle relaxes, the suspensory ligaments tighten and stretch the lens, allowing for distance vision.
Choose the correctly paired terms.
nyctalopia: night blindness
In a 30 year old man who has red-green color blindness, light having a wavelength of 530 nm is perceived as being green. This man ______.
perceives that red light has a green color
Which of the following statements is FALSE?
Nyctalopia affects vision in the fovea centralis, resulting in impaired vision.
Which photoreceptors respond to very dim light?
As light hits the retina, the first structure the light encounters is a rod or a cone.
If the optic chiasma is destroyed but the rest of the visual pathway to the brain is not damaged, the result would be ______.
loss of peripheral vision on both the far right and far left sides of the visual field
Which part of the visual pathway is responsible for our daily biorhythms?
Damage to the medial portion of the optic chiasm, cause by a pituitary tumor, would lead to __________.
loss of peripheral vision
During otitis media, large amounts of fluid or pus may accumulate in the tympanic cavity; the fluid is primarily ______.
Identify the structure that forms cranial nerve I.
Which cells in this pathway are ciliated?
Which of these is NOT found in the olfactory epithelium?
How are the olfactory receptors activated?
Odorants dissolve in the mucus and bind to receptors.
Choose the FALSE statement about the olfactory epithelium.
It is made of simple squamous epithelium.
Which of the following would be the LEAST likely to be associated with the development of motion sickness?
having a non-functional vestibular apparatus
Which of these lettered structures serve as the taste cells?
Name the types of papillae that contain taste buds.
fungiform, foliate, and vallate
What is the purpose of the cell at letter B?
to replace gustatory cells that are damaged
Which of the following is the basic taste quality responsible for the amino acid flavor of steak?
Most taste buds are located __________.
on the top surface of the fungiform papillae
Which of the following is NOT a requirement for something to be tasted?
The tastant must contact the basal epithelial cells of the taste buds.
Rubella infection during early pregnancy may cause damage to the embryo’s ______.
All of the listed responses are correct.
Which region of the ear houses perilymph and endolymph?
Which letter indicates structures involved in detection of BOTH hearing and equilibrium?
A middle ear infection (otitis media) would be located in which region?
Damage to which of these structures can result in sensorineural deafness?
Otosclerosis, which can result in conduction deafness, affects which of these structures?
What are the names of the bones at A, in order from left to right?
malleus, incus, stapes
What part of the inner ear houses the receptor organ of hearing, the spiral organ (organ of Corti)?
Which part of the inner ear houses receptors for rotational (angular) movement of the head?
Name the enlarged swelling at the end of A that is a sensory structure.
Which middle ear ossicle is attached to, and transmits vibratory motion to, the oval window?
Which portion of the ear is responsible for sound transduction?
How many ossicles are found in the ear?
What type of channel is responsible for the initial changes in the membrane potential of the hair cells, which ultimately determines the cochlear nerve response to sound?
Name the structure represented by (1).
Identify the function of (2) in this image.
They conduct sound waves and amplify the vibrations within the middle ear.
Transduction of lower frequency sound waves occurs at the __________ of the cochlea.
At rest, when no sound is entering the cochlea, the hair cells send no signal.
Height of a wave is called the __________.
What structure helps us localize sound?
the superior olivary nucleus
Congenital sensorineural deafness most commonly involves damage to ______.
the cochlear hair cells
Which of the following are the receptors for static equilibrium?
What does the vestibular apparatus detect?
head position in space
Which of the following correctly matches the equilibrium receptor organs to the type of equilibrium it monitors?
Where are equilibrium receptors located?
in the semicircular canals and in the vestibule of the ear
The semicircular canals are adapted to detect static equilibrium.
Which of the following is true of receptors for dynamic equilibrium?
The receptors for dynamic equilibrium respond to rotational forces.
Information from balance (equilibrium) receptors is processed in __________.
the brain stem