UW-Madison BIOLOGY 101 - Exam 3 Study Guide (8 pages)

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Exam 3 Study Guide



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Exam 3 Study Guide

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Pages:
8
Type:
Study Guide
School:
University of Wisconsin, Madison
Course:
Biology 101 - Zoology 101: Animal Biology
Edition:
1
Documents in this Packet

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Zoology101 Animal Biology Exam 3 Study Guide Lectures 23 32 Lecture 23 October 24 How does the nervous system change as the animal becomes more complex As the animal s complexity increase so does the nervous system For example Cnidarians are very simple creatures requiring an underdeveloped nervous system such as a nerve net Humans on the other hand have 2 types of nervous systems and cephalization Name the structures of a neuron and describe them The dendrites are the finger like projections at the top of the neuron that receive the signal the cell body maintains the shape The axon hillock is the point of summation in a cell in which the signal is generated the axon sends the signal down to the terminal branches via the myelin sheath the synaptic terminal sends the signal to the other cell List the three types of glial cells where they can be found and what their function is Schwann cells myelinate the axon to increase signal speed these are found in the peripheral nervous system Oligodendrites also myelinate the axon to increase signal speed but are found in the central nervous system Astrocytes are used in metabolic support and the blood brain barrier these are found in the central nervous system If you wanted to increase signaling speed what would you want to do to the axon In order to increase speed of the signal you would want to increase the axon diameter and the amount of myelin sheath The nervous system has two components the central nervous system and the peripheral nervous system What comprises both systems In the CNS the brain and spinal cord make up the entire system In the PNS there are two subsections of nerves afferent and efferent Afferent neurons are the sensory system taking in external cues and the efferent nervous system is the motor system signaling skeletal contractions and the autonomic system signaling involuntary muscles and smooth muscles Explain the sympathetic and parasympathetic response The sympathetic response regulates fight or



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