ASU BIO 181 Exam 3 Study Guide 2023 (Questions with Answers 100% Correct)

ASU BIO 181 Exam 3 Study Guide 2023 (Questions with Answers 100% Correct) T/F Excitatory synapses cause hyperpolarization of post-synaptic cells. - ANSWER False The resting potential of neurons is: - ANSWER -60 mv (The answer is not on this list.) T/F The autonomic nervous system contains the sympathetic and the parasympathetic nervous system. - ANSWER True In the motor end plate, the event that is the immediate trigger for exocytosis is: - ANSWER Calcium Ions Draw an action potential in the axon of a neuron and indicate which ions flow into the neuron and out of the neuron as the action potential passes at the point where the electrodes are in the cell. Be sure to assign on the Y-axis the mV of each of these areas. This should be as described in my lectures. - ANSWER The action potential is: - ANSWER A result of the movement of ions. T/F The cell body refers to the part of the neurons that begin at the dendrites and extend to the axon terminal. - ANSWER False T/F When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end plate. - ANSWER True The post-synaptic cell can be: - ANSWER In glands, muscle cells, neurons T/F Excitatory synapses cause depolarization of the post-synaptic cell. - ANSWER True T/F Only pre-synaptic neurons are coated with myelin. - ANSWER False T/F Fast neurons as described in lecture are fast because they are surrounded by a type of glial cell that results in a myelin coating. - ANSWER False T/F The axon from a pre-synaptic cell contacts the axon of another neuron. - ANSWER False List the 4 types of glial cells and list a phrase to describe their function. - ANSWER - Microglia: Are part of the cellular immune system to protect the brain since the humoral immune system usually cannot cross the BB barrier. - Astrocytes: Contribute to the blood brain barrier - Schwann Cells: myelinates axons of the neurons in the PNS - Oligodendrocytes: Myelinates axons of the neurons of the CNS The central nervous system (CNS) contains: - ANSWER Brain and Spinal Cord (There is no correct answer). T/F Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion channel. - ANSWER False T/F Acetylcholine esterase breaks acetylcholine into muscarinic acid - ANSWER False T/F The membrane potential (resting potential) is largely set by the Na-K- ATPase pump. - ANSWER True T/F The receptors in post-synaptic cells are the basis on which the synapse can be defined as inhibitory or excitatory. - ANSWER False T/F The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs. - ANSWER True