Podcast
Questions and Answers
What happens to the voltage-gated Na+ channels after the threshold is reached?
What happens to the voltage-gated Na+ channels after the threshold is reached?
What is the primary function of the Na+-K+ pump?
What is the primary function of the Na+-K+ pump?
What happens to the 'upstream' part of the membrane after an action potential occurs?
What happens to the 'upstream' part of the membrane after an action potential occurs?
During the repolarization phase of an action potential, which ions move out of the cell?
During the repolarization phase of an action potential, which ions move out of the cell?
Signup and view all the answers
What is the term for the process by which an action potential jumps from one node of Ranvier to the next in a myelinated axon?
What is the term for the process by which an action potential jumps from one node of Ranvier to the next in a myelinated axon?
Signup and view all the answers
What is the maximum frequency of action potentials limited by?
What is the maximum frequency of action potentials limited by?
Signup and view all the answers
What is the direction of propagation of an action potential along the cell membrane?
What is the direction of propagation of an action potential along the cell membrane?
Signup and view all the answers
What is the purpose of the myelin sheath in the propagation of an action potential?
What is the purpose of the myelin sheath in the propagation of an action potential?
Signup and view all the answers
What happens when an action potential reaches the end of an axon?
What happens when an action potential reaches the end of an axon?
Signup and view all the answers
What is the characteristic of an action potential that describes it as an 'all-or-none' response?
What is the characteristic of an action potential that describes it as an 'all-or-none' response?
Signup and view all the answers
What is the term for the connection between two different neurons where the action potential is transmitted?
What is the term for the connection between two different neurons where the action potential is transmitted?
Signup and view all the answers
What is the result of a thicker myelin sheath on the propagation of an action potential?
What is the result of a thicker myelin sheath on the propagation of an action potential?
Signup and view all the answers
What occurs when the membrane potential depolarizes to threshold along the axon of a neuron?
What occurs when the membrane potential depolarizes to threshold along the axon of a neuron?
Signup and view all the answers
What is the main reason why an action potential does not travel backwards?
What is the main reason why an action potential does not travel backwards?
Signup and view all the answers
During the refractory period, what is true about the affected part of the membrane?
During the refractory period, what is true about the affected part of the membrane?
Signup and view all the answers
What is the primary role of sodium ions in generating an action potential?
What is the primary role of sodium ions in generating an action potential?
Signup and view all the answers
What is the characteristic of an action potential that makes it an 'all or none' event?
What is the characteristic of an action potential that makes it an 'all or none' event?
Signup and view all the answers
What is the purpose of the trigger zone in a neuron?
What is the purpose of the trigger zone in a neuron?
Signup and view all the answers