THE NERVOUS SYSTEM An Introduction. Basic Functions  Sensory Input  Integration  Motor Output.

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Presentation transcript:

THE NERVOUS SYSTEM An Introduction

Basic Functions  Sensory Input  Integration  Motor Output

Nervous vs. Endocrine Fast Control Neurons Neurotransmitters Short-Term Effects “Slow” Control Blood Stream Hormones Lasting Effects Monitor Stimuli React Homeostasis

Nervous System Central Nervous System Peripheral Nervous System Somatic Autonomic Sympathetic Parasympathetic Sensory (afferent) Motor (efferent)

Organization of the Nervous System 1. Central Nervous System (CNS)  Brain, Spinal Cord  Integration Center 2. Peripheral Nervous System (PNS)  Nerves  Sensation, Reaction

 Sensory (Afferent)  Sense Receptors  CNS  Monitors interior & exterior  Motor (Efferent)  CNS  Effectors (Muscles/Glands) Organization of the PNS

Organization of the Efferent Division 1. Somatic  Voluntary  CNS  Skeletal Muscles 2. Autonomic  Involuntary  CNS  Glands, cardiac, smooth muscle

Autonomic Organization  Sympathetic  “Fight or Flight”  Parasympathetic  “Rest or Digest”

Nervous System Central Nervous System Peripheral Nervous System Somatic Autonomic Sympathetic Parasympathetic Sensory (afferent) Motor (efferent)

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