BIOS 1300 SI
EXAM 4 REVIEW - WORKSHEET 1
SI Leader: Merrin Jeffries (email:mj983011@ohio.edu)
23 November 2014
1. Regulation by the nervous system provides:
a. relatively slow, but long lasting, responses to stimuli
b. swift, long lasting responses to stimuli
c. swift, but brief, responses to stimuli
d. relatively slow, short lived responses to stimuli
2. In the CNS, a neuron typically receives information from other neurons at its:
a. axon
b. Nissl bodies
c. dendrites
d. nucleus
3. Phagocytic cells in neural tissue of the CNS are:
a. astrocytes
b. ependymal cells
c. oligodendrocytes
d. microglia
4. The neural cells responsible for the analysis of sensory inputs and coordination of
motor outputs are:
a. neuroglia
b. interneurons
c. sensory neurons
d. motor neurons
5. Depolarization of a neuron plasma membrane will shift the membrane potential
toward
a. 0mV
b. -70mV
c. -90mV
d. all of these
6. The primary determinant of the resting membrane potential is:
a. The membrane permeability to sodium
b. The membrane permeability to potassium
c. intracellular negatively charged proteins
d. negatively charged chloride ions in the ECF
7. Receptors that bind acetylcholine at the postsynaptic membrane are:
a. chemically gated channels
b. voltage gated channels
c. passive channels
d. mechanically gated channels
8. If the RMP is -70mV and the threshold is -55m, a membrane potential of -60mV
will
a. produce an action potential
b. make it easier to produce an action potential
c. make it harder to produce an action potential
d. hyperpolarize the membrane
9. The ventral roots of each spinal segment
a. bring sensory information into the spinal cord
b. control peripheral effectors
c. contain the axons of somatic motor control and visceral motor neurons
d. do both b and c
10. Spinal nerves are called mixed nerves because they
a. contain sensory and motor fibers
b. exit the intervertebral foramina
c. are associated with a pair of dorsal root ganglia
d. are associated with dorsal and ventral roots
11. The adult spinal cord extends only to:
a. the coccyx
b. the sacrum
c. the third or fourth lumbar vertebra
d. the first of second lumbar vertebra
e. the last thoracic vertebra
12. Which of the following statements is FALSE concerning the gray matter of the
spinal cord?
a. it is located in the interior of the spinal cord around the central canal
b. it functions in processing neural information
c. it is primarily involved in relaying information to the brain
d. it contains motor neurons
e. it is divided into regions called horns
13. the following are the steps involved in a reflex arc.
1. activation of a sensory neuron
2. activation of a motor neuron
3. response by an effector
4. arrival of a stimulus and activation of a receptor
5. information processing
a. 1, 3, 4, 5, 2
b. 4, 5, 3, 1, 2
c. 4, 1, 5, 2, 3
d. 4, 3, 1, 5, 2
e. 3, 1, 4, 5, 2
14. A sensory region monitored by the dorsal rami of a single spinal segment is:
a. a ganglion
b. a fascicle
c. a dermatome
d. a ramus
15. The major nerve of the cervical plexus that innervates the diaphragm is the
a. median nerve
b. axillary nerve
c. phrenic nerve
d. fibular nerve
16. The genitofemoral, femoral, and lateral femoral cutaneous nerves are major
nerves of the
a. lumbar plexus
b. sacral plexus
c. brachial plexus
d. cervical plexus
17. The synapsing of several neurons on the same postsynaptic neuron is called
a. serial processing
b. reverberation
c. divergence
d. convergence
18. The reflexes that control the most rapid, stereotyped motor responses to stimuli
are:
a. monosynaptic reflexes
b. polysynaptic reflexes
c. tendon reflexes
d. extensor reflexes
19. An example of a stretch reflex triggered by passive muscle movement is the
a. tendon reflex
b. patellar reflex
c. flexor reflex
d. ipsilateral reflex
20. The contraction of flexor muscles and the relaxation of extensor muscles
illustrates the principle of
a. reverberating circuitry
b. generalized facilitation
c. reciprocal inhibition
d. reinforcement
21. Reflex arcs in which sensory stimulus and the motor response occur on the same
side of the body are
a. contralateral
b. paraesthetic
c. ipsilateral
d. monosynaptic
22. Proceeding deep from the most superficial layer, number the following in the
correct sequence:
a.____________ walls of vertebral canal
b.____________ pia mater
c.____________ dura mater
d.____________ arachnoid mater
e.____________ subdural space
f._____________ subarachnoid
g.____________ epidural space
h.____________ spinal cord
23. Polysynaptic reflexes can produce far more complicated responses than can
monosynaptic reflexes because
a. the response time is quicker
b. the response is initiated by highly sensitive receptors
c. motor neurons carry impulses at a faster rate than do sensory neurons
d. the interneurons involved can control several muscle groups
24. The subarachnoid space contains
a. cerebrospinal fluid
b. lymph
c. air
d. connective tissue and blood vessels
e. denticulate ligaments
25. Side-to-side movements of the spinal cord are prevented by the
a. filum terminale
b. denticulate ligaments
c. dura mater
d. pia mater
e. arachnoid mater
26. Ascending tracts
a. carry sensory information to the brain
b. carry motor information to the brain
c. carry sensory information from the brain
d. carry motor information from the brain
e. connect perceptive areas with the brain
27. The term higher brain centers refers to those areas of the brain involved in
higher order functions. These centers would probably include nuclei, centers, and
cortical areas of
a. the cerebrum
b. the cerebellum
c. the diencephalon
d. all of these
e. a and c only
28. Which of the following is the site of CSF production?
a. dural sinus
b. choroid plexus
c. falx cerebri
d. tentorium cerebelli
e. insula
29. The pons contains
a. sensory and motor nuclei for six cranial nerves
b. nuclei concerned with control of blood pressure
c. tracts that link the cerebellum with the brain stem
d. no ascending or descending tracts
e. both a and b
30. The dural fold that divides the two cerebellar hemispheres is the
a. transverse sinus
b. falx cerebri
c. tentorium cerebelli
d. falx cerebelli
31. CSF is produced and secreted by
a. neurons
b. ependymal cells
c. Purkinje cells
d. basal nuclei
32. The primary purpose of the blood-brain barrier (BBB) is to
a. provide the brain with oxygenated blood
b. drain venous blood via the internal jugular veins
c. isolate neural tissue in the CNS from the general circulation
d. do all of these
33. The centers in the pons that modify the activity of the respiratory rhythmicity
centers in the medulla oblongata are the
a. apneustic and pneumotaxic centers
b. inferior and superior peduncles
c. cardiac and vasomotor centers
d. nucleus gracilis and nucleus cuneatus
34. The final relay point for ascending sensory information that will be projected to
the primary sensory cortex is the
a. hypothalamus
b. thalamus
c. spinal cord
d. medulla oblongata
35. The establishment of emotional states is a function of the
a. limbic system
b. tectum
c. mammillary bodies
d. thalamus
36. Coordination of learned movement patterns at the subconscious level is
performed by
a. the cerebellum
b. the substantia nigra
c. associated fibers
d. the hypothalamus
37. The two cerebral hemispheres are functionally different, even though
automatically they appear the same.
a. true
b. false
38. The only cranial nerves that are attached to the cerebrum are the _____________
nerves
a. optic
b. oculomotor
c. trochlear
d. olfactory
e. abducens
39. Damage to the vestibular nucleus would lead to
a. loss of sight
b. loss of hearing
c. inability to sense pain
d. difficulty in maintaining balance
e. inability to swallow
40. A cerebrovascular accident occurs when
a. the reticular activating system fails to function
b. the prefrontal lobe is damaged
c. the blood supply to a portion of the brain is cut off
d. a descending tract in the spinal cord is severed
e. brain stem nuclei hypersecrete serotonin