BI13_Ch11 PP Slides

BI13_Ch11 PP Slides - Chapter 11 • Overview of nervous...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 11 • 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 Function of the Nervous System Structural Classi¡cation Functional Classi¡cation ! Master controlling and communication system ! 3 overlapping functions ! Sense ! Think ! Respond ! Monitors changes inside and outside of the body ! Millions of sensory receptors gather information ! Nervous system processes and interprets the sensory input ! Decides what should be done ! Nervous system causes a response ! Activates muscles or glands in response to stiumlus Function of the Nervous System Structural Classi¡cation Functional Classi¡cation ! Brain and spinal cord ! Command and integration center ! Filled with fuid ! Not blood ! Outside o¡ CNS ! Spinal nerves " ¡rom cord ! Cranial nerves " ¡rom brain ! Carry impulses to and ¡rom the brain ! Connect all o¡ body to CNS Function o¡ the Nervous System Structural Classi¢cation Functional Classi¢cation ! Under voluntary control ! Targets skeletal muscle ! Under involuntary control ! Targets smooth, cardiac muscle, and glands ! Parasympathetic (resting) vs. sympathetic (emergency) branches ! More in Ch 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 ! erence between the somatic and autonomic nervous system? General Characteristics Structure of a Neuron Arrangement of Neurons ClassiFcation of Nerves Structural ¡unctional ! 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 ! Very long lived ! Cannot divide ! No regeneration ! Poor capacity for repair ! High rate of aerobic metabolism ! Require continuous O 2 ! We have about 10 12 General Characteristics Structure of a Neuron Arrangement of Neurons ! Main body of the neuron ! Surrounds the nucleus ! Highly developed for making proteins and membranes (biosynthetic) ! Many ribosomes ! Large RER (Nissl bodies) ! Input end of the neuron ! Many short tapering extensions ! Usually close to cell body ! 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 ! Secretory component of the neuron ! Holds and releases vesicles of neurotransmitter !...
View Full Document

{[ snackBarMessage ]}

Page1 / 28

BI13_Ch11 PP Slides - Chapter 11 • Overview of nervous...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online