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- 1. Define a resting membrane potential and state what it is for a neuron.19. Identify the two major types of channels that open and close during an action potential in a neuron (see images below). the voltage-gated Na* channel and the voltage-gated K*channel 20. What stimulates the two channels above to open?5. List and the 3 main regions a neuron and the functions of each.
- 8. The resting potential of a neuron that is submerged in a solution with zero extracellular potassium will because. A) hyperpolarize; the driving force for potassium to enter the cell increases B) depolarize; the driving force for potassium to exit the cell increases C) hyperpolarize; the driving force for potassium to exit the cell increases D) depolarize; the driving force for potassium to exit the cell decreases E) hyperpolarize; the driving force for potassium to exit the cell decreases4. Label the structures in the following diagram of a neuron.?10. Other types of cells, called glia, greatly outnumber neurons in the CNS. These cells are shown below. For each, label the glial cell type and give one or more functions that each serves. a) Cell Type: (b) Cell Type: Function: Function: (b) (a) (d) Cell Type: c) Cell Type: Function: Function: (d) Dopymghe 200s Pon Ed Inc pubhing Benjamin Cumming 11. A simple reflex arc is a wired circuit delivering information to and from the central nervous system. Use the diagram to label the structures. Then briefly describe the type of signal that must pass along one cell, cross, and then affect the next cell in the chain. Use the words of neuroanatomy. The signal:
- 6. Briefly describe the function of each part of a neuron: dendrites, cell body, and axon?1. Describe in detail what resting membrane potential is and what role the sodium/potassium leakage channels and the sodium-potassium pump play in maintaining this potential.6. How are action potentials created? What is the process with regard to membrane potential, sodium, and potassium? Why is there a refractory period and why is there an undershoot?
