Bio125 Final-2010key

Bio125 Final-2010key - Name:_ Bio 125 Final 2010. Put your...

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Name:_________________________ - 1 - Bio 125 Final 2010. Put your name on every page (9 pages total). Part 1 _________________________________ 20pts Part 2_________________________________ 44pts Part 3 __________________________________ 8pts Part 4 __________________________________ 18 pts. Part 5 ___________________________________ 10 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. 10 questions 2 points each. 1. (F) Sodium influx is essential for neural transmitter release. 2. (F) During synaptic transmission, Neurotransmitter release is triggered by calcium influx through cGMP gated calcium channels, which open in response to cGMP produced by the arrival of an action potential. 3. (F) Whether a transmitter is excitatory or inhibitory depends on the synaptic vesicles that store the transmitter. 4. (T) A neurotransmitter receptor with an Erev below the resting potential will always decrease the propensity of the post-synaptic cell to fire an action potential. 5. (T) At the equilibrium potential for a permeant ion, the flux of the ion down its concentration gradient is equal to the flux of the ion down the electrical gradient across the membrane. 6. (T) Olfaction is unique among senses in that it does not include a thalamic relay between primary receptors and the cerebral cortex. 7. (F) Neurons in layer IV are the major output neurons of the motor cortex. 8. (F) Rods hyperpolarize in response to light while cones deporlarize in response to light. 9. (F) The forebrain is comprised of the cerebral hemispheres and the cerebellum. 10. (T) Binding of odorant to olfactory receptor activates a Ga (Called G-olf) that in turn activates adenylyl cyclase. Part 2: Multiple choice : circle the best answer. 22 questions 2 points each. 1. When inosital triphosphate (IP 3 ) binds to its receptor which of the following happens? A. Calcium flows into the cytosol from the endoplasmic reticulum. B. The regulatory subunits of the receptor disassociate from the catalytic subunits and activate the kinase activity of the receptor. C. Trimeric G-proteins disassociate and bind GTP. D. Calmodulin binds to receptor and changes its conformation. E. None of these things happen.
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Name:_________________________ - 3 - 2. Which of the following proteins does botullinum toxin cleave? A. GABA receptors B. snare proteins C. nicotinic acetyl choline receptors (nAchR). D. opioid receptors E. transducin 3. Which of the following areas are not involved in mechanosensory detection? A. Dorsal root ganglia B. Cuneate nucleus C. Ventral posterior lateral nucleus D. Reticular formation E. Principal nucleus of the trigeminal complex. 4. Which of the following statements about the olfactory pathway is not true?
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Bio125 Final-2010key - Name:_ Bio 125 Final 2010. Put your...

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