Transcript UNIT 3 THE CONSCIOUS SELF

UNIT 3
THE CONSCIOUS
SELF
AREA OF STUDY 1: MIND, BRAIN &
BODY
THE PERIPHERAL NERVOUS
SYSTEM
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
THE SOMATIC NERVOUS
SYSTEM
REMEMBER…SOMA = BODY
2 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
PNS
CNS
THE SOMATIC NERVOUS
SYSTEM
REMEMBER…SOMA = BODY
2 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
CNS
PNS
TYPES OF NEURONS
HOMEWORK
LEARNING ACTIVITY 5.1 (pg.222)
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
Responsible for ‘regulating’ the involuntary
functioning of these internal organs and glands
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
HOMEWORK
LEARNING ACTIVITY 5.3 (pg.224)
LEARNING ACTIVITY 5.4 (pg.225)
DIVISIONS OF THE
ANS
SYMPATHETIC
NERVOUS
SYSTEM
PARASYMPATHETIC
NERVOUS
SYSTEM
Responsible for increasing the
activity of most visceral muscles,
organs and glands in times of
vigorous activity, stress or threat
Responsible for decreasing the
activity of most visceral muscles,
organs and glands and restoring body
functioning to normal state
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
NERVOUS
(epinephrine)
SYSTEM
NORADRENALINE
ADRENAL
GLANDS
ADRENALINE
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
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
THE EFFECT OF THE
AUTONOMIC NERVOUS SYSTEM
HOMEWORK
LEARNING ACTIVITY 5.5 (pg.228)
LEARNING ACTIVITY 5.6 (pg.228)
LEARNING ACTIVITY 5.7 (pg.229)
CHAPTER 5
CHAPTER 5 – TRUE OR FALSE QUIZ (pg.230)
CHAPTER 5 – MULTIPLE CHOICE TEST (pg.231-232)
CHAPTER 5 – SHORT ANSWER TEST (pg.233-234)