Bio 109 Quiz 6 Questions and Answers 100% Pass

Bio 109 Quiz 6 Questions and Answers 100% Pass A change in the membrane potential of a neuron from a value of -70mV to a value of - 60mV would be called: - Depolarization A change in the membrane potential of a neuron from a value of -70 mV to a value of - 80 mV would be called: depolarization hyperpolarization action potential repolarization - hyperpolarization The point of connection between two communicating neurons is called the: axon hillock dendrite synapse cell body neuronal connector - synapse Which of the following statements concerning the propagation of action potentials is incorrect? 2© EMILY CHARLENE YEAR , ALL RIGHTS RESERVED Saltatory conduction occurs in myelinated axons. During conduction of an action potential, current flows from the active area of the membrane to the adjacent inactive area, thereby bringing the inactive area to threshold. For fibers of equal diameter, action potential propagation is faster in myelinated fibers than in unmyelinated ones. Strong stimuli generate stronger action potentials than weaker stimuli. - Strong stimuli generate stronger actions potentials than weaker stimuli In a neuron, resting potential is maintained by maintaining a gradient of: - Both Potassium and Sodiums ions Threshold stimuli are stimuli that are strong enough to: - cause a net influx of positively charged Na+ ions from outside to inside the cell Acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium channel and opens its. The sodium channel is a: voltage-gated sodium channel. voltage-gated potassium channel. ligand-gated sodium channel. second-messenger-gated channel. - ligand-gated sodium channel Long-term memory information processing requires that links initially established in the hippocampus are replaced with connections in the: medulla pons cerebellum 3© EMILY CHARLENE YEAR , ALL RIGHTS RESERVED cerebral cortex spinal cord - cerebral cortex In a resting potential, an example of a cation that is more abundant in the cytosol of a neuron than in the interstitial fluid outside the neuron is: Cl- K+ Na+ Ca++ - K+ When two excitatory postsynaptic potentials (EPSPs) occur at a single synapse so rapidly in succession that the postsynaptic neuron's membrane potential has not returned to the resting potential before the second