Name UID PSYCH 210 PRACTICE EXAM SPRING Please print your name and University of Illinois ID number in the upper right hand corner of this page and sign on the line in the lower left hand corner Remember to fill in your name UID number NETID and which form you received on your Scantron answer sheet When you are finished with the test or at the end of the class period turn in this cover sheet along with your answer form and present your university ID for identification You may keep the rest of the test booklet Student s signature 1 1 Following an action potential there is a refractory period of about 1 msec A while a phosphorylation of ligand gated calcium channels restores the mitochondrial resting potential B during which neuromodulators rest the graded equilibrium potentials C after which sodium potassium pumps cause the release of synaptic vesicles from intracellular stores D during which sodium channels are inactivated and another action potential can not be produced 2 When a neuron becomes depolarized enough to reach its threshold voltage A voltage gated sodium and potassium channels open to produce an action potential B calcium channels close to release neurotransmitter from intracellular stores C ligand gated channels cause potassium to enter the cell and sodium to leave which produces a receptor potential of 30 mV D an equilibrium potential is produced by the open of voltage gated ligand channels 3 In the movie Showboat bass William Warfield a University of Illinois professor sings Old Man River The low frequencies in his bass voice A activate the tensor tympani and stapedius muscles so that you can effectively use cochlear nucleus neurons to localize the source of the sound B produce the largest vibrations of the basilar membrane near the apex of the cochlea where the membrane is wide and floppy C vibrate the stria vascularis near the base of the cochlea where the stria is narrow and stiff D produce almost no vibrations in the tympanic membrane near the base of the cochlea where the membrane is wide and floppy 4 The thalamus A contains neurons that create complex and hypercomplex receptive fields by combining adjacent several simple receptive fields of retinal ganglion cells B is located in the center of the brain and is a mandatory relay structure for somatosensory auditory and visual information C controls the smooth pursuit phase of eye movements in response to auditory and somatosensory stimuli D is located dorsal to the corpus callosum and integrates information from the what and where pathways to focus visual attention 5 The central nervous system contains A the twelve cranial nerves and the spinal nerves B the sympathetic and parasympathetic nervous systems C the brain and spinal cord D the somatic and autonomic nervous systems 2 6 After visual information is process in primary occipital cortex the identification of visual objects is performed in the what visual stream in A B C D temporal cortex parietal cortex frontal cortex cingulate cortex 7 Simple receptive fields are A B C D created in the superior colliculus to control the smooth pursuit phase of eye movements found both in the retina and in the lateral geniculate nucleus formed in the peripheral part of the retina by combining the inputs from rods and cones formed in primary visual cortex by combining adjacent center surround receptive fields 8 Blind people read the raised dots on paper that make up the Braille alphabet using their fingertips because A receptors there have the smallest receptive fields which produces greater tactile acuity B the unmeylinated axons of the receptors transmit the tactile information without loss because of the regeneration of the receptor potential at each point along the axon C tactile information is preserved by the convergence of many dermatomes onto dorsal horn neurons which perform the basic character recognition D descending inputs from the tegmentum modulate the transduction of tactile information to increase the size of the receptive fields and maximize acuity 9 In the region outside of the fovea namely in the periphery of the retina A there are mostly cones and this region provides us with very good acuity B many rods provide the input to one retinal ganglion cell to increase sensitivity to low levels of light C binocular information is integrated to change simple into complex receptive fields D receptors are rapidly depolarized by light to increase sensitivity to fine details 10 The volley theory of pitch perception relies on A the tonotopic map that arises in the vibrations of the tympanic membrane and is maintained through the superior colliculus and lateral geniculate nucleus B the timing of action potentials in the outer hair cells of the cochlea C the temporal pattern of action potentials namely the number of action potentials per second and the intervals between action potentials D amplification of the sound by the pinna to differentiate high frequencies from low frequencies 3 11 When you hit your thumb with a hammer you first feel a sharp mechanical pain followed by an intense diffuse pain because A the sharp pain releases second messengers from oligodendrocytes that diffuse through the blood stream and reach the brain first B the fibers mediating the sharp pain are myelinated and send information faster than the unmyelinated fibers that mediate the signaling of the diffuse pain C the Schwann cells in the ventral horn that mediate the sharp pain send their axons directly to the thalamus in contrast to the axons of the oligodendrocytes in the dorsal horn that synapse on relay neurons in the medulla D regeneration of the receptor potential occurs faster in the tight junctions along the axons that mediate the sharp pain than in the nodes of Ranvier of the axons that mediate the diffuse pain 12 The right cerebral hemisphere processes A somatosensory information received directly from the spinal cord via the spino cortical tract of Corti B auditory information in parietal cortex and somatosensory information in occipital cortex C visual information from the right visual field in the anterior parietal cortex and visual information from the left visual field in the anterior temporal cortex D somatosensory auditory and visual information from the left half of our sensory world 13 The place theory of pitch perception relies on the A the tonotopic map of frequency that arises in the cochlea and is preserved in all auditory structures B the preservation of timing