Nervous System
Worksheet 2.6
Supplemental Instruction
Iowa State University / Leader: / Hannah
Course: / A ECL 365
Instructor: / Dr. Adams
Date: / 10/13/14
  1. The two major subdivisions of the nervous system are the ______and ______nervous system.
  1. The basic cellular units of the nervous system are ______. These cells possess two different kinds of processes known as ______and ______.
  1. State their function:
  1. There are three main classes of neurons, what are they and their functions?
  1. Neurons communicate via nerve impulses. Describe the characteristics of these impulses.
  1. Describe how a nerve impulse is produced. Make sure to include both the resting potential and the action potential.
  1. Vertebrates increase the speed of impulse conduction by ______axons. In this way, charge propagates by ______movement/conduction.
  1. A ______is a site where signals are transmitted from one cell to another (junction sites). There are two kinds of these – name them and describe their function.
  1. Describe the sequence of signal transmission used in a chemical synapse.
  1. Although brain size tends to ______with body size, proportionally larger animals tend to have relatively______brains.
  1. Certain parts of the brain are either reduced or well developed, depending on use. In birds the ______lobes are enlarged (for great vision) while in mammals the ______lobe is very well developed.
  1. True/False: Humans potentially have the ability to produce brain repair cells, as shown in adult canaries and zebra finches.
  1. Motor neurons can be part of two subdivisions, the ______nervous system (skeletal muscles) or the ______nervous system (other muscles and glands).
  1. Most internal organs are innervated with two ______components of the autonomic nervous system. If one speeds it up, the other slows it down. An example of this is the control of heart rate via the parasympathetic and sympathetic nervous system.
  1. ______are critical for fast responses and use neurological feedback loops to function. These involve only 2-3 neurons and by-pass the ______for an even faster result.
  1. Different lobes of the brain are shown to have different functions in the body. Match the following functions to the correct lobes. (May be more than one right answer)

Speech ______A) Frontal lobe

Motor cortex ______B) Parietal lobe

Hearing ______C) Occipital lobe

Taste _____ D) Temporal lobe

Smell ______

Vision ______

Reading ______

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