Topic 11: Functional Organization of Nervous Tissue • BIO201_MH_V3 • Topic 11: Functional Organization of Nervous Tissue

Topic 11: Functional Organization of Nervous Tissue • BIO201_MH_V3 • Topic 11: Functional Organization of Nervous Tissue Started on Saturday, April 15, 2023, 1:06 AM State Finished Completed on Saturday, April 15, 2023, 1:28 AM Time taken 21 mins 47 secs Grade 35.00 out of 35.00 (100%) Question 1 Correct 1.75 points out of 1.75 Flag question Question text The speed of an action potential depends upon Select one: a. whether an axon is myelinated or not myelinated. b. thickness of the myelin sheath. c. the diameter of the axon. d. All of the choices are correct. Question 2 Correct 1.75 points out of 1.75 Flag question Question text A local potential Select one: a. does not occur until threshold. b. transmits information from one cell to another. c. might be a depolarization event but cannot be a hyperpolarization event. d. increases or decreases in direct proportion to the stimulus strength. e. does not alter resting membrane potential. Question 3 Correct 1.75 points out of 1.75 Flag question Question text Neurotransmitters Select one: a. stimulate presynaptic terminals. b. remain in the synaptic cleft for long periods of time. c. bind irreversibly to the receptor molecules of the postsynaptic membrane. d. cause the production of action potentials in the postsynaptic membrane. e. do not affect membrane channels in the postsynaptic membrane. Question 4 Correct 1.75 points out of 1.75 Flag question Question text For the resting membrane potential, increasing the sodium ion concentration in the ECF results in Select one: a. hyperpolarization. b. depolarization. c. hypopolarization. d. little change in membrane potential. e. There is not enough information to determine the results. Question 5 Correct 1.75 points out of 1.75 Flag question Question text Arrange the events of synaptic transmission in correct sequence. (1) sodium ions diffuse into the cell and cause a local potential (2) neurotransmitter binds with receptor on postsynaptic cell (3) neurotransmitter diffuses across the synaptic cleft (4) membrane permeability to sodium ions on postsynaptic cell increases (5) action potential causes release of neurotransmitter Select one: a. 5, 2, 3, 4, 1 b. 5, 2, 3, 1, 4 c. 5, 3, 4, 1, 2 d. 5, 4, 3, 2, 1 e. 5, 3, 2, 4, 1 Question 6 Correct 1.75 points out of 1.75 Flag question Question text If the charge difference across the plasma membrane is decreased, Select one: a. the potential difference across the plasma membrane does not change. b. the membrane potential is more positive. c. the change is called hyperpolarization. d. negative proteins can leave the cell. e. the membrane potential is more negative. Question 7 Correct 1.75 points out of 1.75 Flag question Question text The function of acetylcholinesterase is to