Podcast
Questions and Answers
What is the term used for a decrease in the amount of negative charge within the cell?
What is the term used for a decrease in the amount of negative charge within the cell?
- Hyperpolarization
- Depolarization (correct)
- Saltatory conduction
- Local neurons
Which law states that the amplitude and velocity of an action potential are independent of the intensity of the stimulus that initiated it?
Which law states that the amplitude and velocity of an action potential are independent of the intensity of the stimulus that initiated it?
- The All-or-None Law (correct)
- Saltatory conduction
- Hyperpolarization
- Graded potential
What happens at the peak of an action potential?
What happens at the peak of an action potential?
- The potassium channels open
- The sodium channels open
- The potassium channels close
- The sodium channels close (correct)
Which ions are mostly outside the neuron at the start, according to the text?
Which ions are mostly outside the neuron at the start, according to the text?
What is responsible for allowing a particular type of ion to cross the membrane in a neuron?
What is responsible for allowing a particular type of ion to cross the membrane in a neuron?
Which term refers to an exaggeration of the usual negative charge within a cell to a more negative level than usual?
Which term refers to an exaggeration of the usual negative charge within a cell to a more negative level than usual?
What is the term used to describe the difference in electrical charge between the inside and outside of a cell when it is at rest?
What is the term used to describe the difference in electrical charge between the inside and outside of a cell when it is at rest?
What is the main reason for the slightly negative electrical potential inside the membrane of a cell?
What is the main reason for the slightly negative electrical potential inside the membrane of a cell?
What protein complex is responsible for transporting three sodium ions out of the cell while drawing two potassium ions into it?
What protein complex is responsible for transporting three sodium ions out of the cell while drawing two potassium ions into it?
Which term describes a disturbance in the resting potential that leads to the development of messages in a neuron?
Which term describes a disturbance in the resting potential that leads to the development of messages in a neuron?
What characteristic of the cell membrane prevents it from depolarizing by allowing some chemicals to pass through more freely than others?
What characteristic of the cell membrane prevents it from depolarizing by allowing some chemicals to pass through more freely than others?
What is responsible for preventing sodium ions from leaking back into the neuron after being pumped out?
What is responsible for preventing sodium ions from leaking back into the neuron after being pumped out?
Which process requires a significant amount of energy from the body?
Which process requires a significant amount of energy from the body?
What is responsible for preparing the neuron to respond rapidly?
What is responsible for preparing the neuron to respond rapidly?
Which force tends to pull sodium into the cell based on opposite electrical charges attraction?
Which force tends to pull sodium into the cell based on opposite electrical charges attraction?
What term describes the change in charge to a more negative level inside an axon during hyperpolarization?
What term describes the change in charge to a more negative level inside an axon during hyperpolarization?
What produces a small response that quickly decays if it does not reach the threshold for a full response?
What produces a small response that quickly decays if it does not reach the threshold for a full response?
