Nervious System, MISC Katie Flashcards
Components of the central nervous system (CNS) include A) peripheral nerves and ganglia. B) the spinal cord and brain. C) autonomic components only. D) efferent components only.
B Spinal Cord and Brain
In the ANS
A) preganglionic fibers innervate the peripheral organs.
B) preganglionic fibers are unmyelinated.
C) there is always a synapse between the CNS motor neuron and the peripheral effector.
D) motor neuron pathways synapse in the same patterns as in the somatic nervous system.
E) None of the answers are correct.
C. there is always a synapse between the CNS motor neuron and the peripheral effector
The autonomic division of the nervous system directs
A) voluntary activity.
B) conscious control of skeletal muscles.
C) behavior.
D) emotions.
E) processes that maintain homeostasis.
E. Processes that maintain homeostasis
The major divisions of the autonomic nervous system (ANS) include
A) the conscious and unconscious nervous systems.
B) the sympathetic and parasympathetic divisions.
C) pre- and postganglionic fibers.
D) the voluntary and involuntary divisions.
E) None of the answers are correct.
B) the sympathetic and parasympathetic divisions.
Which of the following is true of the structures of the sympathetic chain?
A) Preganglionic sympathetic neurons are located in the cervical and thoracic regions only.
B) Each chain contains about 3 cervical, 11 thoracic, 4 lumbar, and 4 sacral sympathetic ganglia.
C) These nerves have white rami, but lack gray rami.
D) About 8 percent of the axons of each spinal nerve are parasympathetic postganglionic fibers.
E) None of the answers are correct.
B) Each chain contains about 3 cervical, 11 thoracic, 4 lumbar, and 4 sacral sympathetic ganglia.
Actions for which the sympathetic division of the ANS is responsible include
A) constriction of the pupils of the eyes.
B) acceleration of heart rate and increase in strength of cardiac contractions.
C) constriction of respiratory passages.
D) increase in digestive activity and the rate of urine formation at the kidneys.
E) All of the answers are correct.
B) acceleration of heart rate and increase in strength of cardiac contractions.
Which of the following is innervated only by the sympathetic division of the ANS? A) heart B) digestive system C) lungs D) esophagus E) sweat glands
e. sweat glands
Cranial nerves that carry parasympathetic components are A) I, II, III, IV, V, VI. B) III, VII, IX, X. C) II, IV, VI, VII, X. D) VII, VIII, IX, XI, XII. E) None of the answers are correct.
B) III, VII, IX, X.
Parasympathetic ganglia in the head include the
A) collateral and celiac.
B) splanchnic and mesenteric.
C) ciliary and pterygopalatine.
D) submandibular and otic.
E) ciliary, pterygopalatine, submandibular, and otic.
E) ciliary, pterygopalatine, submandibular, and otic.
Neural activity that controls the focusing of the eyes passes through the \_\_\_\_\_\_\_\_ ganglion. A) otic B) ciliary C) optic D) pterygopalatine E) submandibular
b.
ciliary
Injury to the neurons of the otic ganglion would affect the function of (the) A) heart. B) digestive tract. C) sweat glands. D) pupils. E) salivary glands.
E. salivary glands
The ventral root of a spinal nerve contains A) axons of sensory neurons. B) ventral rami. C) axons of motor neurons. D) cell bodies of motor neurons. E) interneurons.
C. axons of motor neurons
Spinal nerves extending distal to the conus medullaris are collectively referred to as the A) filum terminale. B) denticulate ligaments. C) cauda equina. D) spinal meninges. E) motor neurons
C. cauda equina
The ventral root of a spinal nerve transmits \_\_\_\_\_\_\_\_ information \_\_\_\_\_\_\_\_ the spinal cord. A) sensory; toward B) sensory; away from C) motor; toward D) motor; away from E) visceral; toward
D. motor away
The pia mater is connected to the dura mater to anchor the spinal cord in place at paired structures called A) coccygeal ligaments. B) the conus medullaris. C) denticulate ligaments. D) the filum terminale. E) None of the answers are correct.
d. enticulate ligaments
The H-shaped mass in the center of the spinal cord is mostly A) white matter. B) gray matter. C) axons. D) black matter. E) None of the answers are correct.
b. gray matter
What is the correct order of passage for visceral motor fibers on their way to a spinal nerve? (1) autonomic ganglion (2) ventral root (3) gray ramus (4) lateral gray horn (5) white ramus A) 4, 3, 2, 1, 5 B) 1, 4, 5, 2, 3 C) 4, 2, 5, 1, 3 D) 1, 4, 2, 5, 3 E) 5, 4, 2, 3, 1
C: 4, 2, 5, 1, 3
The large connection between the lumbar and sacral plexuses is called (the) A) sciatic nerve. B) tibial nerve. C) pelvic plexus. D) lumbosacral trunk. E) None of the answers are correct.
D. lumbosacral trunk
The ulnar nerve is found in the \_\_\_\_\_\_\_\_ plexus. A) cervical B) thoracic C) lumbar D) brachial E) sacral
d. brachial
The cervical plexus
A) consists of the ventral rami of spinal nerves C1—C4, and some fibers from C5.
B) gives rise to motor branches that innervate the muscles of the neck.
C) gives rise to the phrenic nerve, which provides the sole motor supply to the diaphragm.
D) gives rise to branches that supply the skin of the neck, shoulder, and upper chest region.
E) All of the answers are correct.
E. All of the above
Which of the following is a nerve of the cervical plexus? A) median nerve B) lesser occipital nerve C) nerve to subclavius D) axillary nerve E) All of the answers are correct.
b. lesser occipital
Which is the correct order of mixing in the brachial plexus?
A) root, cord, trunk, peripheral nerves, division
B) division, peripheral nerves, cord, trunk, root
C) root, trunk, division, cord, peripheral nerves
D) trunk, peripheral nerves, cord, division, root
E) None of the answers are correct.
C) root, trunk, division, cord, peripheral nerves
The largest nerve in the body that is formed from L4-S3 is the A) tibial. B) brachial. C) sciatic. D) radial. E) None of the answers are correct.
c. sciatic
The levator scapulae, scalenes, and sternocleidomastoid are innervated by the \_\_\_\_\_\_\_\_ plexus. A) brachial B) lumbar C) cervical D) neck E) axillary
C. cervical
Every spinal segment is associated with a pair of ________ that contain the cell bodies of sensory neurons.
dorsal root ganglion
The cerebrospinal fluid is located in the ________.
sub arachnoid space
