S09#2 - BMS 300 Exam 2C Spring 2009 Name C.S.U. ID# 1. A...

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BMS 300 Name Exam 2C Spring 2009 C.S.U. ID# 1. A protease, whose effect is to remove the "ball and chain" on the vol tage-gated Na + channel, is added to the inside of the conduct! I e region of a neuron. The effect of this treatment would be to: a reduce the duration of the action potential . b. prevent the membrane from reaching threshold. c. prevent or prolong the return of the membrane potential to the resting level . d. prevent the inactivation of voltage-gated Na + channels. (§} c and d are correct. 2. At chemical synapses, _ primarily dictates the postsynaptic response. a. the type of neuron that rel eases the neurotransmi tter b. the ability of the neurotransmi tter to move through the ligand-gated channel (cpthe receptor that binds the neurotransmi tter d. the neurotransmi tter that bi nds to the receptor e. a and dare correct. 3. Theroleofjdenylyl cydaseJsto: (J£ convert ATP to cyd i c A M P ID. phosphoryl ate a channel. c. activate a GTP bi ndi ng protei n. d. bind neurotransmi tter. e. Al I of the above are correct. 4. M ovement di sorders associ ated wi th Parki nson' s Di sease and an i nabi I i ty to i ni ti ate movement and Huntington's Disease associated with the uncontrolled generation of movement result from damage to neurons i n the: b. ventral horn of the spinal cord. c. postcentral gyrus. d. parietal association cortex. e. dorsal col umns 5. Destruction of the thai ami c relay nudeuson the left side of the brain would block the arrival of: <ja^ I modal i ti es of somatosensory i nf ormati on from the ri ght si de of the body. b. pai n, temperature, and crude touch from the right ade of the body. c. fine touch and proprioception from the right side of the body. d. pai n, temperature, and crude touch from the I eft si de of the body. e. fine touch and proprioception from the left side of the body. 6. Ligand-gated ionotropic channels are opened by: a. a change i n the di stri buti on of i oni c charge across the membrane. b. Na + enter! ng the eel I . c. K + leaving the eel I. (^neurotransmi tter mol ecul es bi ndi ng sped f i cal I y to a receptor. ^e. a, b, and c are correct.
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BS300 Exam 2 March 11, 2009 1 3. Decreasi ng the membrane resi stance of the i nput regi on of a neuron i n the central nervous system would: a i ncrease the number of EPSPs that are needed to summate at the tri gger zone to reach threshol d. b. decrease the peri od of ti me duri ng whi ch EPSPs can summate. c. decrease the ampl itudes of EPSPs reach! ng the trigger zone. d. i ncrease the ampl i tude of EPSPs reachi ng the tri gger zone. except d are correct. 45 6 14. 1 n the accompanyi ng diagram, Na + influx exceeds all other ion movments at: a 1 C0>, c. 3 d.4 e. 5 1 5. 1 n the accompanyi ng diagram, the predomi nant open channel type at 4 and 5 is the: a. voltage-gated Na + channel.
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This note was uploaded on 02/07/2011 for the course BMS 300 taught by Professor Walrond during the Spring '07 term at Colorado State.

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S09#2 - BMS 300 Exam 2C Spring 2009 Name C.S.U. ID# 1. A...

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