Transcript The Nervous System

The
Nervous
System
Functions of the Nervous
System
1. the center of all thought, learning and
memory
Functions of the Nervous
System
1.
the center of all thought, learning and memory
2. regulates and maintains homeostasis (a
state of balance)
examples: body
temperature,
heart rate,
respiration,
digestion
Functions of the Nervous
System
1.
2.
the center of all thought, learning and memory
regulates and maintains homeostasis (a state of
balance)
examples: body
temperature, heart
rate, respiration,
digestion
3. keeps us in touch
with our internal
and external
environment
Central Nervous System
1. Made up of brain and
spinal cord
Central Nervous System
1.
Made up of brain and spinal cord
2. Three main parts of brain:
a)
Cerebrum- interprets input from senses
and controls
voluntary muscles
Central Nervous System
1.
Made up of brain and spinal cord
2. Three main parts of brain:
a)
Cerebrum- interprets input from senses and
controls voluntary muscles
b)
Cerebellumcoordinates actions
of muscles and
helps keep your
balance
Central Nervous System
1.
Made up of brain and spinal cord
2. Three main parts of brain:
a)
b)
a)
Cerebrum- interprets input from senses and
controls voluntary muscles
Cerebellumcoordinates actions
of muscles and helps
keep your balance
Brainstem- controls
homeostasis and
coordinates
involuntary
muscles
What is this part of the brain
called?
a) Cerebrum
b) Cerebellum
c) Brain
stem
d) Spinal
cord
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What is the function of the brain
stem?
a) Controls homeostasis
& voluntary muscles
b) Controls senses &
voluntary muscles
c) Controls balance &
coordinates muscles
d) Controls homeostasis
& involuntary muscles
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When you feel hungry, what function is
your nervous system trying to carry out?
a) Maintaining
homeostasis
b) Moving your body
c) Sensing your
environment
d) Keeping your
balance
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Nerve Cells
Nerve cells are called neurons
Impulse- a message carried by a neuron
Synapse- the small space that an impulse
jumps between neurons
Types of Neurons
1. Sensory neurons: can sense pressure,
temperature, pain, and 5 senses
in skin, muscles, joints and sense organs
(nose, tongue, eyes, ears)
Types of Neurons
2. Motor neurons: stimulate muscle cells
throughout the body
includes muscles of the heart, diaphragm,
intestines, and bladder
Types of Neurons
3. Interneurons: connect other neurons
all neurons in the central nervous system
(brain, spinal cord) are interneurons
Types of Neurons
Reflex- an involuntary
response to a stimulus
(change in environment)
that allows the body to
respond quickly without
thinking about it
What is an impulse?
a) A nerve cell
b) A message carried
by neurons
c) The space between
two neurons
d) A reflex
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What is this structure called?
a) Axon
b) Synaptic
terminal
c) Nucleus
d) Dendrite
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What does a motor neuron
stimulate?
a)
b)
c)
d)
Brain cells
Sensory organs
Muscle cells
Sensory neurons
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Which is not true about a reflex?
a) It is a quick
response.
b) It is voluntary.
c) It does not require
conscious thought.
d) It is a response to
an external
stimulus.
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