WorksheetsAnatomy Exam 3
Total questions: 59
Worksheet time: 30mins
The ___ is the largest part of the hindbrain.
cerebellum
pons
brainstem
cerebrum
hypothalamus
The cerebellum exhibits folds called gyri separated by grooves called sulci.
True
False
The medulla oblongata is the most rostral part of the brain.
True
False
The right and left cerebral hemispheres are separated from each other by
the longitudinal fissure.
the corpus callosum.
the brainstem.
many gyri.
During rapid eye movement (REM) sleep
the muscles relax, and body temperature, blood pressure, and heart and respiratory rates fall.
a person begins to relax and feels drowsy.
the muscles are very relaxed and body temperature, blood pressure, and heart and respiratory rates are at their lowest levels.
the muscles are paralyzed, and body temperature, blood pressure, and heart and respiratory rates increase.
Nonfluent aphasia, due to a lesion in the ___, results in slow speech, difficulty in choosing words, or use of words that only approximate the correct word.
Broca area
primary motor area
cerebral lateralization
Wernicke area
Which of the following functions would most likely be controlled by the representational hemisphere of the cerebrum?
painting a picture
diagnosing a patient's disease
giving a speech
balancing your checkbook
Both cerebrum and cerebellum have gray matter in their surface cortex and deeper nuclei, and white matter deep to the cortex.
True
False
Structures in the diencephalon control homeostasis and relay sensory signals to specific regions of the cerebral cortex.
True
False
There are three cranial nerves involved in eye movement and two in the sense of taste.
True
False
This is the largest of the cranial nerves and the most important sensory nerve of the face.
the abducens nerve (VI)
the hypoglossal nerve (XII)
the accessory nerve (XI)
the trigeminal nerve (V)
This nerve innervates most of the viscera in the thoracic and abdominopelvic cavities.
the hypoglossal nerve (XII)
the accessory nerve (XI)
the trochlear nerve (IV)
the vagus nerve (X)
The ___ division tends to prepare the body for "fight and flight".
sensory afferent
motor afferent
sympathetic
parasympathetic
___ neurons are the most common type of neurons.
Multipolar
Bipolar
Unipolar
Anaxonic
____ are the primary site for receiving signals from other neurons.
Synaptic knobs
Axons
Axon collaterals
Dendrites
The myelin sheath is formed by
fibers.
cells.
macromolecules.
polymers.
___ has the greatest influence on the resting membrane potential.
Sodium
Chloride
Phosphate
Potassium
Local potentials are _____, meaning they vary in magnitude according to the strength of the stimulus.
decremental
reversible
graded
excitatory
___ binds to ligand-regulated gates, and is the most common inhibitory neurotransmitter in the brain.
γ-aminobutyric acid (GABA)
Noradrenaline
Epinephrine
Acetylcholine
Unipolar neurons have only a single process leading away from the soma.
True
False
Oligodendrocytes serve the same purpose in the CNS that satellite cells do in the PNS.
True
False
In a myelinated fiber only the initial segment in the trigger zone have voltage-regulated channels.
True
False
Memories are formed by neural pathways of modified synapses.
True
False
A ganglion is a
cluster of neurosomas in the CNS.
bundle of axons in the PNS.
cluster of dendrites in either the CNS or the PNS.
cluster of neurosomas in the PNS.
Which one of the following best describes the order of a somatic reflex?
somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → smooth muscle
somatic receptor → efferent nerve fiber → interneuron → afferent nerve fiber → skeletal muscle
somatic receptor → afferent nerve fiber → interneuron → efferent nerve fiber → skeletal muscle
somatic receptor → interneuron → afferent nerve fiber → efferent nerve fiber → skeletal muscle
Which of the following groups of muscles have the most muscle spindles?
muscles of the back
muscles of the torso
muscles of the thigh
muscles of the hand
The quickest reflex arcs involve only two neurons, thus forming __ reflex arcs.
ipsilateral
monosynaptic
contralateral
autonomic
Cervical and lumbar enlargements are wide points in the spinal cord marking the emergence of motor nerves.
True
False
Somatic reflexes are responses of skeletal, smooth, and cardiac muscles.
True
False
The spinal cord conducts signals up and down the body passing through gray and white matter, respectively.
True
False
Most nerves are motor nerves.
True
False
This figure shows a detail of the spinal cord, meninges, and spinal nerves. What does "1" represent?
posterior root of a spinal nerve
anterior root of a spinal nerve
posterior horn
anterior horn
This figure shows a cross section of the spinal cord. What does "3" represent?
anterior root of spinal cord
anterior column
posterior column
anterior horn
A nurse pricks your finger to type your blood. You flinch at the pain, pulling your hand back. This is called the
flexor (withdrawal) reflex.
stretch (myotatic) reflex.
crossed extension reflex.
painful reflex.
The bundle of nerve roots that occupy the vertebral canal from L2 to S5 is called the
medullary cone.
cauda equina.
cervical enlargement.
lumbar enlargement.
Which nerve(s) carries the most parasympathetic fibers?
spinal nerves
pelvic splanchnic nerves
nerves of the abdominal aortic plexus
vagus nerve (CN X)
Damage to the ___ may affect near vision accommodation.
celiac ganglion
oculomotor nerve (CN III)
facial nerve (CN VII)
glossopharyngeal nerve (CN IX)
The parasympathetic division stimulates digestion.
True
False
The effect of autonomic fibers on target cells is ___, and/whereas the effect of somatic fibers is ___.
always excitatory; always excitatory too
excitatory or inhibitory; always excitatory
excitatory or inhibitory; excitatory or inhibitory
always inhibitory; excitatory or inhibitory
Sympathetic fibers arise only from the ____ region(s) of the spinal cord.
cervical, thoracic, and lumbar
thoracic and lumbar
thoracic
cervical
Both divisions of the autonomic nervous system are normally active simultaneously.
True
False
Fibers of the vagus nerve end very near or within their target organs.
True
False
The autonomic nervous system controls all of the following except the
adrenal gland.
smooth muscle in the walls of the aorta.
skeletal muscle in the rectus abdominis.
parotid salivary gland.
Autonomic nervous system fibers are involved in all of the following except
changing the diameter of the pupil.
adjusting heart rate and force.
altering salivary mucus secretion.
maintaining tonicity of the muscles of the neck.
In response to high blood pressure, stretch receptors called ____ in the walls of arteries carrying blood to the head will trigger a reflex that causes the heart to ____ its beats per minute.
proprioceptors; decrease
baroreceptors; decrease
baroreceptors; increase
proprioceptors; increase
This figure shows a division of the autonomic nervous system. The label __ represents the Vagus Nerve (CN X).
2
4
3
1
A patient is experiencing a high fever, stiff neck, drowsiness, and intense headaches. A spinal tap showed bacteria and white blood cells in the cerebrospinal fluid (CSF). This individual most likely has
a stroke.
Parkinson disease.
meningitis
Alzheimer disease.
The initial effect of a stimulus on a sensory receptor is a local electrical change specifically called a(an)
receptor potential.
sensory potential.
graded potential.
local potential.
What is a sensation?
an unconscious response to a stimulus
a response to any conscious stimulus
a subjective awareness of a stimulus
a response of a sensory receptor
___ is the only sense in which signals can reach the cerebral cortex without passing first through the thalamus.
Smell
Taste
Equilibrium
Touch
This figure shows the internal anatomy of the ear. What does "3" represent?
the stapes
the round window
the oval window
the incus
A 100 dB sound (loud) of 150 Hz (low pitch) would cause the
tectorial membrane to vibrate slightly near its distal end.
basilar membrane to vibrate vigorously near its distal end.
basilar membrane to vibrate slightly near its distal end.
tectorial membrane to vibrate vigorously near its proximal end.
When you spin while sitting in a swivel chair with your eyes closed, you can sense this movement by means of your
spiral organ (organ of Corti).
cochlea.
saccule.
semicircular ducts.
Nerve fibers from all regions of the retina converge on the ___ and exit the eye by way of the optic nerve.
ora serrata
optic disc
lens
macula lutea
___ are responsible for photopic (day) vision as well as trichromatic (color) vision.
Ganglion cells
Cones
Rods
Bipolar cells
Divergent sensory pathways explain the phenomenon of referred pain.
True
False
Olfaction results from the stimulation of chemoreceptors.
True
False
The macula sacculi is nearly horizontal and the macula utriculi is nearly vertical.
True
False
Vitamin A is necessary for the synthesis of rhodopsin.
True
False
