key midterm 1-2010

key midterm 1-2010 - Name Bio 125 Midterm 1 fall 2010 Put...

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Name:_________________________ - 1 - Bio 125 Midterm 1 fall 2010. Put your name on every page (11 pages total). Part 1 _________________________________ 14pts Part 2_________________________________ 42pts Part 3 __________________________________ 7 pts Part 4 __________________________________ 15 pts Part 5 __________________________________ 22 pts. Total __________________________________ 100pts
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Name:_________________________ - 2 - Part 1: True/ False. If the statement is true, circle true; if the statement is false, circle false. 7 questions 14 points each. 1. (F) Conductance (g) is the reciprocal of voltage (V). 2. (F) Both glia and neurons send information via action potentials. 3. (F) The resting membrane potential is not exactly equal to the Nernst potential for potassium because the membrane has some permeability to species other than potassium. 4. (F) Nerve cells are exceptionally good conductors of electricity (much better, e.g., than copper wires). 5. (T) At electric synapses gap junctions allow current to flow between neurons in both direction. 6. (T) Exocytosis and endocytosis are important for synaptic communication. 7. (F) When current is injected into an axon, an action potential is always evoked before the current can spread any distance from the point of injection. Part 2: Multiple choice: circle the best answer. 21 questions 2 points each. 1. The scientist who shared the Nobel Prize with Camillo Golgi for his anatomical studies of the CNS was A. Bernard Katz. B. Roger Sperry. C. Santiago Ramon y Cajal. D. Louis Pasteur. E. Alan Hodgkin. 2. Which type of glial cell participates in removing neurotransmitter from the synaptic cleft in the CNS: A. microglia B. schwann cell C. astrocyte D. oligodendrocyte E. ependymal cell 3. In which neocortical area is the primary motor cortex located? A. precentral gyrus B. postcentral gyrus C. Broca's area in the frontal cortex D. Wernicke's area in the temporal cortex
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Name:_________________________ - 3 - E. parietal lope 4. Which cell type in the central nervous system (CNS) forms myelin and "insulates" axons? A. astrocytes B. microglia C. oligodendroglia D. neurons E. eppendamal cells 5. Which part of the brain listed below is involved in heart beat regulation? A. cerebellum B. midbrain C. hypothalamus D. brainstem E. cerebrum 6. The postcentral gyrus is in which part of the brain? A. cerebral cortex B. basal ganglia C. midbrain D. spinal cord E. cerebellum 7. Neurons firing action potentials encode a signal’s intensity typically by A. changing the size of their action potentials. B. changing the frequency of their action potentials. C. firing at precise moments so as to signal different sized signals. D. sending signals of different sizes down different axonal branches.
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key midterm 1-2010 - Name Bio 125 Midterm 1 fall 2010 Put...

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