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Unformatted text preview: Neurobiology CODE NUMBER __________________________ Midterm II, Fall 2007 ZO 488 / ZO 588 Neurobiology Midterm Exam II ZO 488 / ZO 588 **If you find a mistake in this key, please let me know.** TRUE / FALSE (21 points total) 1. TRUE The thalamus and hypothalamus are part of the diencephalon. 2. FALSE Neurons with axons in the rubrospinal tract have cell bodies in the spinal cord. **Neurons with axons in the rubrospinal tract would have cell bodies in the red nucleus and would form synapses in the spinal cord.** 3. FALSE Merkel’s disks can be either depolarized or hyperpolarized, depending on the nature of the stimulus. **Merkel’s disks, like other mechanoreceptors, are depolarized by the stimuli to which they respond.** 4. FALSE The specialized sensory receptor neurons of the vestibular system are called otoliths. **Receptor neurons of the vestibular system are hair cells.** 5. TRUE Acetylcholine, glutamate, and dopamine can be either inhibitory or excitatory, depending on the receptors expressed by the postsynaptic cell. 6. TRUE Auditory hair cells are depolarized by an influx of potassium (K + ). 7. TRUE The cerebellum sends information to the cortex by way of the ventrolateral (VL) nucleus of the thalamus. 8. TRUE The ventral stream of visual processing includes temporal association cortex and is involved in the recognition of objects 9. FALSE The strength of a gustatory stimulus is coded by the size of action potentials it triggers. **Strength of any stimulus is coded by the frequency of action potentials, not their size – action potential amplitude typically does not vary.** 10. FALSE Positron emission tomography (PET) scans are good for structural, but not functional, imaging of the brain. **PET scans are good for functional imaging; not good for structural imaging.** 11. TRUE Photoreceptors and hair cells do not generate action potentials. 12. TRUE Gamma motor neurons play an important role in ensuring that the stretch reflex can occur regardless of the starting length of the muscle. 13. TRUE Both the basal ganglia and the cerebellum receive inputs from cerebral cortex, but the cerebellum receives relatively more inputs from sensory cortex. 14. TRUE The norepinephrine, serotonin, and acetylcholine diffuse modulatory systems are all involved in the sleep/wake cycle. CODE NUMBER __________________________ page 1 15. TRUE Damage to the cerebellum results in cerebellar ataxia. 16. TRUE Aphasias are disorders of language. 17. TRUE The striatum receives inputs from almost all regions of cerebral cortex. 18. TRUE Cells in the neural tube give rise to the central nervous system, and cells in the neural crest give rise to the peripheral nervous system....
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- Spring '08
- Neurobiology, Primary Sensory Cortex, code number