The Nervous System

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The Nervous System
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Functions of the Nervous System

• the center of all thought, learning and memory

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Functions of the Nervous System

• the center of all
• thought, learning and
• memory
• regulates and
• maintains
• homeostasis (a state of balance)
• examples body temperature, heart rate,
  respiration, digestion

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Functions of the Nervous System

• the center of all
• thought, learning and
• memory
• regulates and
• maintains homeostasis
• (a state of balance)
• examples body
• temperature, heart rate, respiration, digestion
• keeps us in touch with our internal and external
  environment

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Two Divisions of the Nervous System

• Central Nervous
• System- brain and
• spinal cord

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Two Divisions of the Nervous System

• Central Nervous System- brain and spinal cord
• Three Main Parts of Brain
• Cerebrum-
• interprets input from
• senses and controls
• voluntary muscles

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Two Divisions of the Nervous System

• Central Nervous System- brain and spinal cord
• Three Main Parts of Brain
• Cerebrum- interprets
• input from senses and
• controls voluntary
• muscles
• Cerebellum- coordinates
• actions of muscles and
• helps keep your balance

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Two Divisions of the Nervous System

• Central Nervous System- brain and spinal cord
• Three Main Parts of Brain
• Cerebrum- interprets
• input from senses and
• controls voluntary muscles
• Cerebellum- coordinates
• actions of muscles and
• helps keep your balance
• Brainstem- controls
• homeostasis and
• coordinates involuntary
• muscles

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What is this part of the brain called?

1. Cerebrum
2. Cerebellum
3. Brain stem
4. Spinal cord

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What is the function of the brain stem?

1. Controls homeostasis voluntary muscles
2. Controls senses voluntary muscles
3. Controls balance coordinates muscles
4. Controls homeostasis involuntary muscles

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When you feel hungry, what function is your
nervous system trying to carry out?

1. Maintaining homeostasis
2. Moving your body
3. Sensing your environment
4. Keeping your balance

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Two Divisions of the Nervous System

• Peripheral Nervous
• System- connects the
• Central Nervous System
• to the rest of the body

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Two Divisions of the Nervous System

• Peripheral Nervous System- connects the Central
  Nervous System to the rest of the body
• Two Groups
• Somatic nervous system-
• controls voluntary actions
• and input from senses
• (sound, sight, touch, etc.)

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Two Divisions of the Nervous System

• Peripheral Nervous System- connects the Central
  Nervous System to the rest of the body
• Two Groups
• Somatic nervous system-
• controls voluntary actions and
• input from senses (sound,
• sight, touch, etc.)
• Autonomic nervous system-
• controls homeostasis by
• regulating the heart, breathing,
• and digestion without
• conscious thought

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Which division of the nervous system is made up
of the brain spinal cord?

1. Autonomic nervous system
2. Somatic nervous system
3. Central nervous system
4. Peripheral nervous system

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Which part of the Peripheral Nervous System
controls processes that maintain homeostasis
without you even thinking about it?

1. Autonomic nervous system
2. Somatic nervous system
3. Central nervous system
4. Peripheral nervous system

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Nerve cells are called neurons

• Impulse- a message carried by a neuron

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Nerve cells are called neurons

• Impulse- a message carried by a neuron
• Synapse- the small space that an impulse jumps
  between neurons

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Types of Neurons

• Sensory neurons in the skin, muscles, joints,
  and organs that can sense pressure, temperature,
  and pain 

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Types of Neurons

• Sensory neurons in the skin, muscles, joints,
  and organs that can sense pressure, temperature,
  and pain 
• neurons in nose tongue sense tastes and smells
• neurons in inner ear
• sense sounds
• rods and cones in eye
• sense sight

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Types of Neurons

• Motor neurons stimulate muscle cells throughout
  the body

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Types of Neurons

• Motor neurons stimulate muscle cells throughout
  the body
• includes muscles of the heart, diaphragm,
  intestines, and bladder

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What is an impulse?

1. A nerve cell
2. A message carried by neurons
3. The space between two neurons
4. A reflex

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What is this structure called?

1. Axon
2. Synaptic terminal
3. Nucleus
4. Dendrite

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What does a motor neuron stimulate?

1. Brain cells
2. Sensory organs
3. Muscle cells
4. Sensory neurons

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Types of Neurons

• Interneurons connect other neurons

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Types of Neurons

• Interneurons connect other neurons
• all neurons in the central nervous system (brain,
  spinal cord) are interneurons

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Reflex

• Reflex- an involuntary
• response to a stimulus
• (change in environment)
• that allows the body to
• respond quickly without
• thinking about it.

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What is a change in the environment that your
body responds to called?

1. Stimulus
2. Response
3. Reflex
4. Sense

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Which is not true about a reflex?

1. It is a quick response.
2. It is voluntary.
3. It does not require conscious thought.
4. It is a response to an external stimulus.

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