Title: Chemical
1Chemical Electrical Coordination Systems
The Nervous System.
- Ch 36 Guide
- Life is in the eye of the beholder
2Evolution of the Nervous System
3From brain Stem to Cerebrum
4IB.What is the function of the nervous system?
- To receive
- information from
- a sensory neuron
- To process
- info. by the
- brain spinal cord
- To respond by an
- effectors (muscle/gland)
5AcupunctureStimulation of nerve centers
6Alternative views . . . . . .
7IA. The basic unit of the nervous system
neuron?
- Dendrites receive stimuli
- Nerve cell body
- _at_ nucleus transmits the stimuli
- Axon transmits the impulse to another dendrite
8Axon ending terminal bud
- Transfers the electrical nerve impulse
- By chemical neuron-transmitters
- From one neuron to the next
9IA2. Two connecting neurons
Impulse direction
Axon ending
Dendrite of new neuron
Axon Cell Body
10REVIEW.
- What is the name of the nerve cell ?
- Does the stimulus travel one- way or down the
neuron in two directions? - Which part receives the stimuli? (The synapse,
dendrites, cell body, or axon) - Which is covered by a myelin sheath ?
- What is the purpose of the myelin sheath?
11IB2a.Sensory neurons orreceptors receive a
stimulus from
- eyes - sight
- ears - hearing
- nose - smell
- skin - touch
- mouth - taste
122b. The Central Nervous System
- 1) Spinal Cord
- 2) Brain
- medulla for
- breathing
- cerebellum for
- balance
- cerebrum for
- higher thinking bw
132c. Effectors that do actions are the
- Muscles
- voluntary use the somatic system
- involuntary use autonomic
- system
- Glands
- endocrine organs
- that make hormone messengers
-
14Cerebral Cortex higher thinking
15The real thing . . . . . . . .
16Parts of the Cerebrum
17Cerebellum old brain controls basic body
functions
18Right versus left Cerebrum
19Infrared Tools to Study the brain . . . .
20Schizophrenia a normal brain scan
21Any blow to the head does brain damage Example of
amnesia processing skills
22D. What is a synapse ?
- Junction of two neurons
- Neurotransmitters convert the electrical impulse
into a chemical message
23 E. The 2 types of nervous responses?
- a. Voluntary that use
- the brain
- spinal cord
- b. Involuntary or
- Autonomic System
- Sympathetic
- Parasympathetic
24The involuntary system Autonomic basic body
functions reflex arcs
25The Autonomic Nervous System
26 REVIEW The Autonomic Nervous System...
- Automatic
- Two parts
- parasympathetic
- sympathetic
- Which is fight or flight response ?
- Which is ordinary involuntary body functions ?
27E2. Involuntary Reflex Arcs . . . .
- Use only spinal cord
- Do not go to the brain
- Follow the R-SIM pathway
- Examples
- knee jerk, eye blink,
- hot stove pull back
28R-SIM Reflex arc pathway . . .
- R
- receptor neuron receives the stimuli
- S
- sensory neuron passes the impulse on
- I
- interneuron at the spinal cord processes
- M
- motor neuron acts
29Is Pain part of the Reflex Arc ???
30The five types of receptors
- Are highly specialized
- Receive only one type of stimuli
- Can be overloaded when over stimulated
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32 Sensory Laboratory. . . . . . . . .
- PURPOSE
- Map the distance between touch receptors
- Measure the extent of peripheral vision
- Determine the effects of cone saturation
- Map the taste receptors
- Measure reflex timing
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34Map of Taste Receptors . . . . B w
35References
- World Book Encyclopedia 99 software for hand out
illustrations. IBM Software Corp. - Encarta Encyclopedia 99 for multimedia slide
presentations. Microsoft Corp.