mid1a-akey.w09 - \John Miyamoto Email:...

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\John Miyamoto Email: jmiyamot@u.washington.edu http://faculty.washington.edu/jmiyamot/p355/p355-set.htm Psych 355: Introduction to Cognitive Psychology Winter 2009 Midterm 1 , VERSION A- ANSWER KEY NAME: UW ID: SECTION AA AB AC AD (circle one) Instructions: This exam has 10 total pages. Check that your copy of the exam has all pages before starting. · You are working on Form #A# of this exam. Record the form of the exam on the scantron form. All questions are worth 1 point. Turn off your cell phone. You are not allowed to use any books, notes, computers, cell phones or other electronic devices while taking this exam. 1. Functional magnetic resonance imaging (fMRI) is used to identify areas of the brain that are active when people perform particular cognitive tasks. This neuroimaging technique is based on what principle? a) If an area of the brain is active, the electrical activity in that area increases. fMRI detects changes in electrical activity by detecting the effects of electrical activity on magnetic fields. b) If an area of the brain is active, larger amounts of neurotransmitter are released into the blood in that area. fMRI detects the presence of neurotransmitter in the blood at different loci in the brain. c) Î If an area of the brain is active, it metabolizes oxygen. The circulatory system in the brain responds by sending more oxygenated blood to active areas of the brain. fMRI identifies which areas of the brain contain more oxygenated blood. d) If an area of the brain is active, it requires more blood. In fMRI, a radioactive tracer is injected into a subject's blood. When a subject performs a cognitive task, an fMRI detects which areas of the brain are getting more radioactive tracer. 2. fMRI and ERP are two different ways to acquire images of brain activity. Relative to fMRI, ERP measurements provide: a) Better spatial resolution, worse temporal resolution b) Î Better temporal resolution, worse spatial resolution c) Worse spatial resolution, worse temporal resolution d) Better spatial resolution, better temporal resolution 3. Suppose that neuron A provides input to neuron B at a synapse. Neuron A is inhibatory with respect to neuron B if: a) neuron B never fires when neuron A fires. b) neuron A only fires when neuron B is not firing. c) increased firing of neuron A produces increased firing of neuron B. d) Î increased firing of neuron A produces decreased firing of neuron B.
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2 4. Action potentials occur in the . .. of a neuron. a) cell body. b) synapse. c) Î axon. d) neurotransmitters. 5. All of the following properties of neural architecture are important to neural information processing EXCEPT: a) Î divergence b) excitation c) inhibition d) convergence 6. Neurotransmitters are a) neurons that are specialized for transmitting electrical signals. b)
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mid1a-akey.w09 - \John Miyamoto Email:...

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