BI13_Ch11 PP Outline

BI13_Ch11 PP Outline - 1 Chapter 11 2 Overview of nervous...

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1 Chapter 11 2 Overview of nervous system structure and function Structure and function of neurons Functions of other cells in the nervous system How the nervous system uses electricity Ion channels Membrane potential Action potentials Structure and function of synapses Neurotransmitters 3 Function of the Nervous System Structural Classi±cation Functional Classi±cation 4 Master controlling and communication system 3 overlapping functions Sense Think Respond 5 Monitors changes inside and outside of the body Millions of sensory receptors gather information 6 Nervous system processes and interprets the sensory input Decides what should be done 7 Nervous system causes a response Activates muscles or glands in response to stiumlus 8 Function of the Nervous System Structural Classi±cation Functional Classi±cation 9 Brain and spinal cord Command and integration center Filled with ²uid Not blood 10 Outside of CNS Spinal nerves
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Spinal nerves from cord Cranial nerves from brain Carry impulses to and from the brain Connect all of body to CNS 11 Function of the Nervous System Structural Classi±cation Functional Classi±cation 12 Under voluntary control Targets skeletal muscle 13 Under involuntary control Targets smooth, cardiac muscle, and glands Parasympathetic (resting) vs. sympathetic (emergency) branches More in Ch 14 14 Place the following functions of the nervous system in order Integration Sensory input Motor output True or false? The somatic nervous system is exclusively in the PNS. What is the di f erence between the somatic and autonomic nervous system? 15 General Characteristics Structure of a Neuron Arrangement of Neurons Classi±cation of Nerves Structural Functional 16 Neural tissue is highly cellular Neurons are the structural unit of the nervous system Large cells with long processes Neuroglia are the support cells Much smaller 17 Very long lived Cannot divide No regeneration
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Poor capacity for repair High rate of aerobic metabolism Require continuous O2 We have about 1012 neurons 18 General Characteristics Structure of a Neuron Arrangement of Neurons ClassiFcation of Nerves Structural ±unctional 19 Main body of the neuron Surrounds the nucleus Highly developed for making proteins and membranes (biosynthetic) Many ribosomes Large RER (Nissl bodies) Large glogi apparatus 20 Input end of the neuron Many short tapering extensions Usually close to cell body 21 Single output end of the neuron Can branch into axon collaterals Usually long and thin Can be 3-4 feet Called a nerve Fber Begins in the cell body at axon hillock Used to generate and send nervous impulses 22 Secretory component of the neuron Holds and releases vesicles of neurotransmitter Distal tip of the axon ±orms a synapse Where nerve “talks” to its target cell 23 Electrically insulates Fber Increases speed & distance of neural impulses Whitish, fatty, segmented layer around axon Neurilemma Outer most layer of cell that forms the myelin sheath
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24 General Characteristics Structure of a Neuron
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BI13_Ch11 PP Outline - 1 Chapter 11 2 Overview of nervous...

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