Neural Circuits Final Exam Questions & Answers, Rated 100%

Neural Circuits Final Exam Questions & Answers, Rated 100%-If a dendritic segment were to serve as a processing unit, it should? A) be located close to the soma B) release neurotransmitter C) have the capacity to locally fire action potentials D) have a very thin diameter - Have the capacity to locally fire action potentials If a neuron has a resonant frequency of 5Hz, which would produce the greatest depolarization? A) EPSP activated at 5ms intervals B) IPSP activated at 5 ms intervals C) EPSP activated at 500ms intervals D) EPSP activated at 200ms intervals - EPSP Activated at 200 ms interval LTP is typically expressed as? A) Increase in postsynaptic receptor number B) decrease in spike threshold C) decrease in the activation of Ca dependent potassium channels D) increase in potassium concentration outside of a cell - Increase in postsynaptic receptor number Two excitatory synapses onto a neuron can each produce suprathreshold EPSPs on their own. Therefore, the individual activation of either of these inputs and firing of the cell represents? A) a Boolean AND Function B) spatial summation C) a Boolean OR function D) temporal summation - a Boolean OR Function Hebb's "postulate for learning" or "rule" depends on? A) presynaptic neuron firing B) postsynaptic neuron firing C) synaptic inhibition D)A and B E) A, B and C - presynaptic neuron firing, postsynaptic neuron firing For the knee jerk reflex, what is roughly proportional to the force of the stimulus below the knee? A) the number of spikes generated in the sensory neuron B) the number of spikes generated in the motor neuron C) the amount of neurotransmitter released from the sensory neurons synaptic terminals D) A and B E) A, B and C - the number of spikes generated in the sensory neuron, the number of spikes generated in the motor neuron, the amount of neurotransmitter released from the sensory neurons synaptic terminals Spike threshold is most affected by? A) the density of Nav channels B) location of the axon C) width of the afterhyperpolarization D) the shape of the neuron - The density of Nav channels Another way of describing a Boolean AND Function is? A) coincidence detection B) a multidimensional logic gate C) inclusive OR function D) exclusive OR function - coincidence detection A subthreshold excitatory input onto which neuronal location is most likely to produce the greatest depolarization at the spike initiation zone of a motor neuron? Assume all synapses release the same amount of neurotransmitter onto the same density and properties of receptors? A) synaptic terminal B) a dendrite 300 um from the soma C) the neurotransmitter junction D) a dendrite 20 um from the soma - a dendrite 20 um from the soma The amplitude of an EPSP can be regulated by? A) varying the average concentration of NTs in each synaptic vesicle B) altering the number of vesicles released per presynaptic action potential C) raising spike threshold D) A and B E) A and C - varying the average concentration of NTs in each synaptic vesicle, altering the number of vesicles released per presynaptic action potential What is an example of how resonance of individual cells contributes to a neural system? A) Perceptrons B) Lateral inhibition effect on contrast enhancement from sensory input to the skin C) The vestibular ocular reflex D) Frequency tuning along the basilar membrane of the cholea of the inner ear - Frequency tuning along the basilar membrane of the cholea of the inner ear IPSPs limit or prevent the firing of a neuron by? A) making spike threshold more hyperpolarized B) keeping membrane potential from reaching spike threshold C) influencing the likelihood of transmitter release at synaptic terminals D) enhancing the inactivation of Nav channels E) making spike threshold more depolarized - keeping membrane potential from reaching spike threshold