The Brain and Cranial Nerves
The choroid plexus produces CSF at a rate of about
A) 500 mL/day. B) 250 mL/day. C) 50 mL/day. D) 1000 mL/day. E) 150 mL/day Answer: A
The thin partition that separates the first and second ventricles is the
A) falx cerebri. B) septum pellucidum. C) septum insula. D) interventricular foramina. E) cerebral aqueduct. Answer: B
Which of the cranial nerves is named for the fact that it "wanders", that is, innervates structures throughout the thorax and abdomen?
A) VIII B) IX C) X D) XI E) XII Answer: C
The cerebellum can be permanently damaged by stroke or temporarily affected by drugs or alcohol. The resulting disturbance in motor control is known as
A) ataxia. B) aphasia. C) dysphagia. D) A or C E) B or C Answer: A
The cells that cover the outer surfaces of CNS endothelial cells are the
A) blastocytes. B) astrocytes. C) monocytes. D) leukocytes. E) lymphocytes. Answer: B
The medulla oblongata regulates
A) blood pressure. B) food intake. C) respiration. D) both A and B E) both A and C Answer: E
The ________ provides the principal link between the nervous and endocrine systems.
A) cerebellum B) medullaoblongata C) cerebrum D) pons E) hypothalamus Answer: E
A neural cortex is found on the surface of the
A) cerebral hemispheres. B) pons. C) cerebellum. D) all of the above E) A and C only Answer: E
Which of these is not one of the main divisions of the adult brain?
A) cerebrum B) diencephalon C) prosencephalon D) mesencephalon E) pons Answer: C
The dural fold that projects into the longitudinal fissure between cerebral hemispheres is called the
A) dural sinus. B) falx cerebri. C) tentoriumc erebelli. D) falx cerebelli. E) choroid plexus. Answer: B
Specialized ________ cells form the secretory component of the choroidplexus.
A) epididymal B) ependymal C) appended D) both A and B E) both B and C Answer: B
A patient develops a tumor of a cranial nerve that leads to difficulty in speaking from a loss of tongue movement. Which cranial nerve is affected?
A) glossopharyngeal B) hypoglossal C) vagus D) spinal accessory E) trigeminal Answer: B
Which sensation(s) does the vestibulocochlear nerve carry?
A) hearing B) equilbrium C) atmospheric pressure D) A and Bonly E) A, B, and C Answer: D
The floor of the diencephalon is formed by the
A) hypothalamus. B) thalamus. C) brainstem. D) mesencephalon. E) myelencephalon. Answer: A
Which of the following lies between the cerebrum and the brain stem?
A) medulla oblongata B) pons C) mesencephalon D) diencephalon E) cerebellum Answer: D
Autonomic centers that control blood pressure, heart rate, and digestion are located in the
A) medulla oblongata. B) pons. C) mesencephalon. D) diencephalon. E) cerebellum. Answer: A
The tracts that connects the cerebellum to the brain stem are located in the
A) medulla oblongata. B) pons. C) mesencephalon. D) diencephalon. E) thalamus. Answer: B
Sensory information is processed and relayed to the cerebrum by the
A) medulla oblongata. B) pons. C) midbrain. D) thalamus. E) cerebellum. Answer: D
Olfactory receptors send axons through the cribriform plate and synapse on neurons in the
A) medulla. B) thalamus. C) cerebral cortex. D) olfactory bulb. E) olfactory tract. Answer: D
As you ascend from the medulla oblongata to the cerebrum, the functions of each successive level become
A) more complex. B) simpler. C) better understood. D) less crucial to visceral functions. E) both A and D Answer: E
As CSF circulates, ________ between it and the interstitial fluid of the CNS is unrestricted between and across the ependyma.
A) osmosis B) perfusion C) diffusion D) convection E) conduction Answer: C
The region of the cerebral cortex superior to the latera lsulcus is the
A) parietal lobe. B) temporal lobe. C) frontal lobe. D) occipital lobe. E) A and C Answer: E
Joe begins to experience mood swings and disturbed thirst and hunger. Imaging studies indicate that a brain tumor is the likely cause of these disorders. In what part of the brain is the tumor most likely located?
A) prefrontal cortex B) postcentral gyrus C) basal nuclei D) hypothalamus E) reticular formation Answer: D
The pons contains
A) sensory and motor nuclei for four cranial nerves. B) nuclei concerned with the control of respiration. C) tracts that link the cerebellum with the brain stem. D) both B and C E) A, B, and C Answer: E
The cerebellum and pons develop from the
A) telencephalon. B) diencephalon. C) mesencephalon. D) metencephalon. E) myelencephalon. Answer: D
Which antibiotic enters the CNS without difficulty because it easily crosses the blood-brain barrier?
A) tetracycline B) doxycycline C) sulfadiazine D) periostat E) actisite Answer: C
Which of the following help to protect the brain?
A) the blood-brain barrier B) the bones of the skull C) the cranial meninges D) the CSF E) all of the above Answer: E
Terry suffers from dissociation of memories from their emotional content as the result of an automobile accident. What system of the brain is probably damaged?
A) the prefrontal lobe B) the general interpretive area C) the limbic system D) the thalamus E) the putamen Answer: C
Jean needs to have a tooth in her mandible filled. Her dentist injects a local anesthetic to block pain afferents in one of her cranial nerves. What cranial nerve does the dentist numb?
A) trochlear B) trigeminal C) facial D) glossopharyngeal E) hypoglossal Answer: B
Bob is struck on the left side of the head and is knocked unconscious. When he recovers consciousness, he can hear individual words but cannot understand the meaning of phrases or sentences. This implies damage to his
A) vestibulocochlear nerve. B) general interpretive area. C) speech center. D) prefrontal lobe. E) temporal lobe. Answer: B