2. Neurons use action potentials to send information down the axon to stimulate a release of a chemical message for synaptic signalling. (a) Define action potential: (b) What triggers an action potential to occur? (c) Describe the four key steps involved in the generation of an action potential. Complete the task using a graph with membrane potential (mV) on the y-axis and time (ms) on the x-axis. Start with what happens when the membrane potential reaches threshold. For each step, note which channels are opening and closing, the direction of flow of ions across the plasma membrane, and the membrane potential at which this occurs. 3. Both the nervous system and the endocrine system work in parallel to maintain homeostasis around the body. Complete the table below comparing the two systems: Feature Tissue type Signal Signal pathway Nervous system Endocrine System
2. Neurons use action potentials to send information down the axon to stimulate a release of a chemical message for synaptic signalling. (a) Define action potential: (b) What triggers an action potential to occur? (c) Describe the four key steps involved in the generation of an action potential. Complete the task using a graph with membrane potential (mV) on the y-axis and time (ms) on the x-axis. Start with what happens when the membrane potential reaches threshold. For each step, note which channels are opening and closing, the direction of flow of ions across the plasma membrane, and the membrane potential at which this occurs. 3. Both the nervous system and the endocrine system work in parallel to maintain homeostasis around the body. Complete the table below comparing the two systems: Feature Tissue type Signal Signal pathway Nervous system Endocrine System
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Chapter39: Information Flow And The Neuron
Section: Chapter Questions
Problem 7TYK: Which of the following does not contribute to propagation of action potentials? a. As the area...
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