7 The Nervous System PPT-A 33 slides 2 hour

PPT-A OUTLINE PPT-B OUTLINE I. Overall Functions II. NS Organization III. Nervous Tissue IV. Physiology A. Sensory A. Structural A. Cells A. N. Properties B. Integration B. Functional B. Terminology B. Action Potentials C. Motor C. Functional Classification N. D. Structural Classification N. V. Central Nervous System VI Peripheral Nervous System A. Brain A. Nerves B. Spinal Cord B. Autonomic NS PPT-B OUTLINE

I. Overall Functions of the Nervous System A. Sensory input = B. Integration = C. Motor output =

II. Organization of the Nervous System A. Structural Classification 1. *Central nervous system (CNS) = a. *Parts b. *Function 2. Peripheral nervous system (PNS) = a. Parts Ganglia Nerves: Functions:

B. Functional Classification of the Peripheral N.S. 1. Sensory (afferent): 2. Motor (efferent):

III. Nervous Tissue Structure & Function: A. Nervous Tissue Cells 1. Neuroglia (glial): Support cells a. *General functions *Support *Insulate *Protect

Nervous Tissue Structure and Function … 2. Neurons a. Function: b. Parts– i) *Cell body Nissl bodies = rough ER *Nucleus ii) *Processes GO TO SLIDE 10

Dendrite Cell body Mitochondrion Nissl substance Axon hillock Axon Neurofibrils Collateral branch Nucleus One Schwann cell Node of Ranvier Axon terminal Schwann cells, forming the myelin sheath on axon (a) Figure 7.4a

Neuron cell body Dendrite (b) Figure 7.4b

Nervous Tissue: Neurons … ii) *Processes = (1) *Dendrites: (2) *Axons: Axon Hillock *Axon Terminal *Contain Synaptic Vesicles *Neurotransmitters

c. Synaptic cleft = Synapse—gap between adjacent neurons

Nervous Tissue: Neurons … d. Myelin sheath = Cell that forms ii) How forms it iii) Nodes of Ranvier iv) CNS and PNS differences

Schwann cell cytoplasm Schwann cell plasma membrane Axon Schwann cell nucleus (a) (b) Neurilemma Myelin sheath (c) Figure 7.5