Podcast
Questions and Answers
Which type of ion channels change states based on a change in voltage?
Which type of ion channels change states based on a change in voltage?
Which of the following is NOT a state that trans-membrane protein channels can be in?
Which of the following is NOT a state that trans-membrane protein channels can be in?
What causes ligand-gated ion channels to open?
What causes ligand-gated ion channels to open?
What is the term used to describe the process by which an action potential spreads along the membrane of a neuron?
What is the term used to describe the process by which an action potential spreads along the membrane of a neuron?
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What is the principle that governs the recruitment order of motor units during muscle contractions?
What is the principle that governs the recruitment order of motor units during muscle contractions?
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Which type of ion channels change states based on a change in voltage?
Which type of ion channels change states based on a change in voltage?
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What is the term used to describe the process by which an action potential spreads along the membrane of a neuron?
What is the term used to describe the process by which an action potential spreads along the membrane of a neuron?
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What causes ligand-gated ion channels to open?
What causes ligand-gated ion channels to open?
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What is the principle that governs the recruitment order of motor units during muscle contractions?
What is the principle that governs the recruitment order of motor units during muscle contractions?
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What is the equation used to calculate the equilibrium potential for an ion?
What is the equation used to calculate the equilibrium potential for an ion?
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Study Notes
Voltage-Gated Ion Channels
- Voltage-gated ion channels are transmembrane proteins that change their conformation, and therefore their permeability, in response to changes in the membrane potential.
States of Transmembrane Protein Channels
- Open
- Closed
- Inactivated
Ligand-Gated Ion Channels
- Ligand-gated ion channels are opened by the binding of a specific ligand to a receptor site on the channel protein.
Action Potential Propagation
- Propagation of an action potential along the membrane of a neuron is achieved through a process called saltatory conduction, which involves the rapid jumping of the action potential from one node of Ranvier to the next.
Motor Unit Recruitment
- The size principle governs the order of motor unit recruitment during muscle contractions, meaning smaller motor units with slower-twitch fibers are recruited first, followed by progressively larger motor units with faster-twitch fibers.
Nernst Equation
- The Nernst equation is used to calculate the equilibrium potential for an ion, which is the membrane potential at which the electrochemical gradient for that ion is zero.
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Description
Test your knowledge of the fundamentals of motor control and learning in the field of kinesiology with this Midterm I Review quiz. Topics covered include ion channels, action potential propagation, synaptic transmission, muscle spindle anatomy, and more. Challenge yourself and prepare for success in your KNES 251 course.
