1. Bell-Ringer
Briefly describe a situation when you were really startled or scared. Include how your body felt in this situation. What involuntary reactions did your body have to this scary situation?

2. Topic 7 The Nervous System
Essentials of Human Anatomy & Physiology
Seventh Edition
Elaine N. Marieb
Topic 7 The Nervous System
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

3. Functions of the Nervous System
1. Sensory input – gathering information
To monitor changes occurring inside and outside the body (changes = stimuli)
2. Integration –
to process and interpret sensory input and decide if action is needed.
3. Motor output
A response to integrated stimuli
The response activates muscles or glands
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

4. Functions of the Nervous System
Marieb 11.1

5. Structural Classification of the Nervous System
Central nervous system (CNS)
Brain
Spinal cord
Peripheral nervous system (PNS)
Nerve outside the brain and spinal cord
Slide 7.2
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

6. Functional Classification of the Peripheral Nervous System
Sensory (afferent) division
Nerve fibers that carry information to the central nervous system
Figure 7.1
Slide 7.3a
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

7. Functional Classification of the Peripheral Nervous System
Motor (efferent) division
Nerve fibers that carry impulses away from the central nervous system
Figure 7.1
Slide 7.3b
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

8. Functional Classification of the Peripheral Nervous System
Motor (efferent) division
Two subdivisions
Somatic nervous system = voluntary
Autonomic nervous system = involuntary
Figure 7.1
Slide 7.3c
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

9. Organization of the Nervous System
Figure 7.2
Slide 7.4
Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

11. How it affects our behaviors… Sympathetic VS. Parasympathetic