Topic 11 Functional Organization of Nervous Tissue[GRADED A+]

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Page path  BIO201_MH_V3  Topic 11: Functional Organization of Nervous Tissue Started on Thursday, September 9, 2021, 12:02 PM State Finished Completed on Thursday, September 9, 2021, 12:26 ... PM Time taken 23 mins 44 secs Grade 35.00 out of 35.00 (100%) Question 1 Correct 1.75 points out of 1.75 Flag question Question text When repolarization of a neuron is complete, the Select one: a. neuron dies. b. neuron regenerates. c. cell no longer has a potential difference across its membrane. d. original polarity of the neuron is restored. e. neuron is no longer excitable. Question 2 Correct 1.75 points out of 1.75 Flag question Question text A series of local potentials causes the membrane potential to move to -80 mV. Predict the result. Select one: a. threshold is reached b. depolarization occurs c. the neuron is hyperpolarized d. information of frequency is needed to predict the result e. the neuron releases neurotransmitter in response Question 3 Correct 1.75 points out of 1.75 Flag question Question text Voltage-gated sodium channels are sensitive to changes in the extracellular concentration of Select one: a. potassium ions. b. proteins. c. sodium ions. d. chloride ions. e. calcium ions. Question 4 Correct 1.75 points out of 1.75 Flag question Question text Chemical synapses are characterized by Select one: a. the release of neurotransmitter by the presynaptic terminal. b. connexons that connect the pre- and postsynaptic cells. c. the presence of receptors for neurotransmitters on the presynaptic terminal. d. the absence of gap junctions. e. receptors located only on the presynaptic terminal. Question 5 Correct 1.75 points out of 1.75 Flag question Question text When two action potentials arrive simultaneously at two different presynaptic terminals that synapse with the same postsynaptic neuron, Select one: a. the direction of the action potential is reversed. b. temporal summation occurs. c. spatial summation occurs. d. hyperpolarization occurs. e. threshold is never reached. Question 6 Correct 1.75 points out of 1.75 [Show More]

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