ASU BIO 181 Exam 3 1316 Questions and answers rated A VERIFIED

ASU BIO 181 Exam 3 (13-16). Questions and answers, rated A+. VERIFIED. Excitatory synapses make the post-synaptic cell less likely to fire. The neural tissues are: How do the glial cells (i.e., myelin sheath) speed up the firing of neurons? The action potential is: Receptors are made from membrane-bound polyribosomes. List the 4 types of glial cells and list a phrase to describe their function. Acetylcholine exocytosed from the presynaptic cell travels to the postsynaptic cell to start the action potential in the postsynaptic cell. When the presynaptic cell contacts a muscle cell, the synapse area is called a motor end plate. Potassium ions are at high concentrations inside of cells including in neurons. The membrane potential (resting potential) is largely set by the Na-K- ATPase pump. 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. Fast neurons as described in lecture are fast because they are surrounded by a type of glial cell that results in a myelin coating. Voltage-gated ion channels open when a protein binds to the receptor. The cell body refers to the part of the neurons that begin at the dendrites and extend to the axon terminal. Only pre-synaptic neurons are coated with myelin. The post-synaptic cell can be: Fast neurons as described in lecture require cytoplasmic signal transduction to open an ion channel. Acetylcholine esterase breaks acetylcholine into muscarinic acid Excitatory synapses cause hyperpolarization of post-synaptic cells. Excitatory synapses cause depolarization of the post-synaptic cell. The axon hillock in the pre-synaptic neuron fires based on temporal and spatial summation of inputs. The receptors in post-synaptic cells are the basis on which the synapse can be defined as inhibitory or excitatory. The resting potential of neurons is: Draw a neuron, and label all the parts as described in lecture. The central nervous system (CNS) contains: The terminal web: In the motor end plate, the event that is the immediate trigger for exocytosis is: The autonomic nervous system contains the sympathetic and the parasympathetic nervous system. The axon from a pre-synaptic cell contacts the axon of another neuron. Briefly explain why the action potential flows only from the axon hillock to the terminal web.