1. UNIT 3 THE CONSCIOUS SELF
AREA OF STUDY 1: MIND, BRAIN & BODY

2. THE PERIPHERAL NERVOUS SYSTEM
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3. THE PERIPHERAL NERVOUS SYSTEM
The Peripheral Nervous System (PNS)
has two major roles:
To carry information to the CNS
from the body’s muscles,
organs and glands (internal)
and from sensory organs
To carry information from the
CNS to the body’s muscles,
organs and glands
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4. THE SOMATIC NERVOUS SYSTEM
REMEMBER…SOMA = BODY functions of this system
First Function:
Carries sensory information to the CNS
Sensory neurons receive signals from the ears, eyes, nose, skin, tendons, joints, skeletal muscles and tongue amongst other tissues and organs
Carry the information from these to the CNS via sensory neural pathways – also known as afferent pathways
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PNS CNS

5. THE SOMATIC NERVOUS SYSTEM
REMEMBER…SOMA = BODY functions of this system
Second Function:
Carries motor information for voluntary movement from the CNS
Motor neurons carry messages to skeletal muscles causing them to contract or relax, resulting in movement
This happens via motor neural pathways – also known as efferent pathways
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CNS PNS

6. TYPES OF NEURONS
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7. HOMEWORK LEARNING ACTIVITY 5.1 (pg.222)
KK 5A – LEARNING ACTIVITY 5.1 (PAGE 222)

8. THE AUTONOMIC NERVOUS SYSTEM
Connects the CNS to the body’s internal organs (heart, stomach, liver) and glands (sweat, salivary, adrenal), providing feedback about their activities
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Responsible for ‘regulating’ the involuntary functioning of these internal organs and glands

9. THE AUTONOMIC NERVOUS SYSTEM
Let’s take the heart as an example:
Muscles that do not depend on voluntary movement and have in-built mechanisms for generating activity are called
Visceral Muscles
The heart is self-regulating and only provides feedback to the brain from the PNS to the CNS
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10. HOMEWORK LEARNING ACTIVITY 5.3 (pg.224) LEARNING ACTIVITY 5.4 (pg.225)
KK 5A – LEARNING ACTIVITY 5.3 (PAGE 224)
KK 5A – LEARNING ACTIVITY 5.4 (PAGE 225)

11. DIVISIONS OF THE ANS SYMPATHETIC NERVOUS SYSTEM PARASYMPATHETIC
Responsible for increasing the activity of most visceral muscles, organs and glands in times of vigorous activity, stress or threat
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Responsible for decreasing the activity of most visceral muscles, organs and glands and restoring body functioning to normal state

12. DIVISIONS OF THE ANS THE SYMPATHETIC NERVOUS SYSTEM
Activates internal muscles, organs and glands to prepare the body for vigorous activity or to deal with a stressful or threatening situation
SYMPATHETIC ADRENAL ADRENALINE
NERVOUS GLANDS (epinephrine)
SYSTEM
NORADRENALINE
(norepinephrine)
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13. DIVISIONS OF THE ANS THE PARASYMPATHETIC NERVOUS SYSTEM
Counterbalances the activities of the sympathetic nervous system
Restores the body to a sense of calm once the need for the sympathetic nervous system has passed
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In times of minimal stress or in the absence of threats the parasympathetic nervous system helps to maintain the body’s internal environment in a steady, balanced state of normal functioning

14. THE EFFECT OF THE AUTONOMIC NERVOUS SYSTEM
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15. HOMEWORK LEARNING ACTIVITY 5.5 (pg.228) LEARNING ACTIVITY 5.6 (pg.228)
KK 5A – LEARNING ACTIVITY 5.5 (PAGE 228)
KK 5A – LEARNING ACTIVITY 5.6 (PAGE 228)
KK 5A – LEARNING ACTIVITY 5.7 (PAGE 229)

16. CHAPTER 5 CHAPTER 5 – TRUE OR FALSE QUIZ (pg.230)
CHAPTER 5 – MULTIPLE CHOICE TEST (pg )
CHAPTER 5 – SHORT ANSWER TEST (pg )
CHAPTER 5 – TRUE OR FALSE QUIZ (PAGE 230)
CHAPTER 5 – MULTIPLE CHOICE TEST (PAGE )
CHAPTER 5 – SHORT ANSWER TEST (PAGE )