Chapter 35

Name the three basic categories of neuron and describe their functions.

Diagram and label the basic features of a neuron, indicating where information is received and where it is sent.

Graph an action potential, showing the change in electrical potential on the y-axis and time on the x-axis. Indicate on the graph the phases when voltage- gated Na' and \(\mathbf{K}\) ' ion channels are opened and when they are closed.

Explain what is meant by saying action potentials are "all-nothing"

Explain why action potential propagate along an axon only in a single direction.

Briefly describe how myclinated axons increase the speed of signal transmission.

Diagram a chemical synapse,labeling the vesicles that contain neurotransmitter molecules and the receptors that bind the neurotransmitter to produce either an inhibitory or excitatory stimulus in the Postsynaptic cell.

Describe how vertebrate nervous systems are organized into voluntary and involuntary components, listing which functions of an animal are controlled by each component.

Diagram a simple circuit that includes a sensory neuron that synapses with a motor neuron to produce a reflex Indicate where in the nervous system this synapse is found.