Chapters Two and Three Structure and Function of the Nervous System.

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Presentation transcript:

Chapters Two and Three Structure and Function of the Nervous System

The Organization of the Nervous System Organization of the Nervous System

The central nervous system Brain Spinal Cord

The central nervous system Two important areas Reward System Hypothalamus

5 The Peripheral Nervous System –Somatic nervous system: Controls the movement of skeletal muscles or transmits somatosensory information to the central nervous system. –Autonomic nervous system: Controls the body’s vegetative functions. “fight or flight” response Sympathetic division: –Controls functions that accompany arousal and expenditure of energy. Parasympathetic division: –Controls functions that occur during a relaxed state.

Autonomic Nervous System Sympathetic Parasympathetic

Parts of a neuron

8

Transporting items inside a neuron Parts of a neuron

10 Interaction of Axons and Dendrites Interaction of axons and dendrites The Synapse

11 Neuron Communication Presynaptic Neuron: Postsynaptic Neuron:

Chemical Synapse Neurotransmitters Are Released in Exocytosis Releasing the neurotransmitter into the synapse

Two Types of Receptors Ionotropic receptors Receptor: Ligand:

Two Types of Receptors Metabotropic receptors

16 Lifespan of a neurotransmitter 1.Synthesis 2.Storage 3.Release 4.Action on the target cell 5.Deactivation

Neurotransmitter inactivation

Terminal autoreceptors

Summary of the mechanisms by which drugs can alter synaptic transmission

Major endocrine glands and their location in the body

Organization of the hypothalamic–pituitary axis

3.15 Comparison of synaptic versus endocrine communication