30 Questions
What is the effect of inhibition on the resting membrane potential?
It becomes more negative
What is the primary mechanism that drives the membrane excitability in neurons?
Voltage gated channels
What happens to the resting membrane potential during depolarization?
It becomes more positive
What is the direction of ion flow during depolarization?
Positive ions enter the cell
What is the term for the minimum amount of depolarization required to trigger an action potential?
Threshold
What is the effect of excitatory potentials on the resting membrane potential?
It becomes more positive
What happens to the membrane potential during depolarization?
It becomes less negative
What is the duration of an action potential?
Around 1 millisecond
What is the principle that describes the generation of action potentials?
All or None principle
What is the term for the brief reversal of the membrane potential during an action potential?
Covershoot
What type of ion channels are involved in the generation of action potentials?
Voltage-gated ion channels
What is the term for the period when the membrane potential is more negative than usual?
Hyperpolarization
What is the zone where action potentials are initiated?
Axon hillock
What is responsible for the depolarization phase of an action potential?
Sodium conductance
What is the change in membrane potential that leads to an action potential?
Depolarization
Who was the first to record the resting membrane potential and action potential from a living neuron?
Alan L. Hodgkin and Andrew F. Huxley
What is the term for the minimum amount of current density required to generate an action potential?
Threshold
Where do action potentials propagate along the neuron?
From axon hillock to axon terminals
What is the primary function of the nervous system?
To interpret, store, and respond to information received from inside and outside the body
What is the term for the movement of ions into a neuron that causes the membrane potential to become more negative?
Hyperpolarization
What is the minimum amount of depolarization required for an action potential to occur?
Threshold
What is the process by which an action potential travels along the length of a neuron?
Propagation
What is the term for the state of a neuron when it is not actively generating an action potential?
Resting membrane potential
What is the structure responsible for generating action potentials in neurons?
Excitable membrane
What is the main function of the axon terminals?
To transmit signals to other neurons or to muscles or glands
Which type of neuron has a single axon with multiple dendrites?
Multipolar neuron
What is the typical resting membrane potential of a neuron?
-65 mV
What is the primary means of communication between neurons?
Electrochemical signals
What is the structure that surrounds the cytoplasm of living cells and separates the intracellular components from the extracellular environment?
Cell membrane
What is the term for the potential difference across a cell membrane?
Membrane potential
Learn about the basics of neuron excitability, including depolarization, hyperpolarization, and action potentials. Understand how these signals affect the membrane potential and lead to neural responses.
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