Chapter 5 - Section 1Nervous System
2
Ner vous System
Ner vous System!Any internal or external change that brings about a response is called a stimulus
Ner vous System!Any internal or external change that brings about a response is called a stimulus!Noise, light, the smell ...
Ner vous System!Any internal or external change that brings about a response is called a stimulus!Noise, light, the smell ...
Ner vous System!Any internal or external change that brings about a response is called a stimulus!Noise, light, the smell ...
Keeping ever y thing in order
Keeping ever y thing in order!The   regulation of steady, life-maintaining conditions inside an organism, despite changes ...
Keeping ever y thing in order!The   regulation of steady, life-maintaining conditions inside an organism, despite changes ...
Ner ve Cells
Neurons are made up of a cell body and branchescelled dendrites and axons.
Axons carry impulses away from the cell body. The axonbranches at the end to send the signal to many othermuscles, neurons...
Types of Ner ve Cells
Types of Ner ve Cells!Motor   Neurons ~ Sensory Neurons ~ Interneurons
Types of Ner ve Cells!Motor   Neurons ~ Sensory Neurons ~ Interneurons
Types of Ner ve Cells!Motor   Neurons ~ Sensory Neurons ~ Interneurons!Sensory    neurons – receive information and send i...
Types of Ner ve Cells!Motor   Neurons ~ Sensory Neurons ~ Interneurons!Sensory    neurons – receive information and send i...
Types of Ner ve Cells!Motor   Neurons ~ Sensory Neurons ~ Interneurons!Sensory    neurons – receive information and send i...
Synapses Tomove from one neuron to the next, an impulse crosses a small space called a synapse.
Synapses
Synapses
Synapses
Synapses!When  an impulse reaches the end of an axon,the axon releases a chemical.
Synapses!When   an impulse reaches the end of an axon, the axon releases a chemical.!This chemical flows across the synaps...
Synapses!When   an impulse reaches the end of an axon, the axon releases a chemical.!This chemical flows across the synaps...
Synapses
Synapses
The Central Ner vous System!The  central nervous system is made up of the brain and spinal cord.
The Central Ner vous System!The  central nervous system is made up of the brain and spinal cord.
CNS – The Brain
CNS – The Brain!The   brain coordinates all of your body activities.
CNS – The Brain!The   brain coordinates all of your body activities.
CNS – The Brain!The   brain coordinates all of your body activities.!Made    of 100 billion neurons
CNS – The Brain!The   brain coordinates all of your body activities.!Made    of 100 billion neurons!WHAT?!?!    100 billio...
CNS – The Brain!The   brain coordinates all of your body activities.!Made    of 100 billion neurons!WHAT?!?!    100 billio...
CNS – The Brain!The   brain coordinates all of your body activities.!Made    of 100 billion neurons!WHAT?!?!    100 billio...
CNS – The Brain
CNS – The Cerebrum
CNS – The Cerebrum!The   cerebrum is the largest part of brain
CNS – The Cerebrum!The   cerebrum is the largest part of brain
CNS – The Cerebrum!The   cerebrum is the largest part of brain!This is where… !thinking takes place !impulses from the sen...
CNS – The Cerebrum!The   cerebrum is the largest part of brain!This is where… !thinking takes place !impulses from the sen...
CNS – The Cerebrum!The   cerebrum is the largest part of brain!This is where… !thinking takes place !impulses from the sen...
CNS – The Cerebrum
CNS - Cerebellum
CNS - Cerebellum!What   is interpreted in the cerebellum? !Stimuli from the eyes and ears !Stimuli from muscles and tendons
CNS - Cerebellum!What   is interpreted in the cerebellum? !Stimuli from the eyes and ears !Stimuli from muscles and tendon...
CNS – The Cerebellum
Science 5
Science 5
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Transcript of "Science 5"

  1. 1. Chapter 5 - Section 1Nervous System
  2. 2. 2
  3. 3. Ner vous System
  4. 4. Ner vous System!Any internal or external change that brings about a response is called a stimulus
  5. 5. Ner vous System!Any internal or external change that brings about a response is called a stimulus!Noise, light, the smell of food, and the temperature of the air are all stimuli from outside your body.
  6. 6. Ner vous System!Any internal or external change that brings about a response is called a stimulus!Noise, light, the smell of food, and the temperature of the air are all stimuli from outside your body.
  7. 7. Ner vous System!Any internal or external change that brings about a response is called a stimulus!Noise, light, the smell of food, and the temperature of the air are all stimuli from outside your body.!Chemical substances such as hormones are examples of stimuli from inside your body.
  8. 8. Keeping ever y thing in order
  9. 9. Keeping ever y thing in order!The regulation of steady, life-maintaining conditions inside an organism, despite changes in its environment, is called homeostasis.
  10. 10. Keeping ever y thing in order!The regulation of steady, life-maintaining conditions inside an organism, despite changes in its environment, is called homeostasis.!Examples: !Regulating breathing !Regulating heartbeat !Regulating digestions
  11. 11. Ner ve Cells
  12. 12. Neurons are made up of a cell body and branchescelled dendrites and axons.
  13. 13. Axons carry impulses away from the cell body. The axonbranches at the end to send the signal to many othermuscles, neurons, or glands.
  14. 14. Types of Ner ve Cells
  15. 15. Types of Ner ve Cells!Motor Neurons ~ Sensory Neurons ~ Interneurons
  16. 16. Types of Ner ve Cells!Motor Neurons ~ Sensory Neurons ~ Interneurons
  17. 17. Types of Ner ve Cells!Motor Neurons ~ Sensory Neurons ~ Interneurons!Sensory neurons – receive information and send impulses to the brian or spinal cord, where…
  18. 18. Types of Ner ve Cells!Motor Neurons ~ Sensory Neurons ~ Interneurons!Sensory neurons – receive information and send impulses to the brian or spinal cord, where…!Interneurons – relay these impulses to…
  19. 19. Types of Ner ve Cells!Motor Neurons ~ Sensory Neurons ~ Interneurons!Sensory neurons – receive information and send impulses to the brian or spinal cord, where…!Interneurons – relay these impulses to…!Motor neurons – conduct impulses from the brain or spinal cord to muscles or glands throughout the body.
  20. 20. Synapses Tomove from one neuron to the next, an impulse crosses a small space called a synapse.
  21. 21. Synapses
  22. 22. Synapses
  23. 23. Synapses
  24. 24. Synapses!When an impulse reaches the end of an axon,the axon releases a chemical.
  25. 25. Synapses!When an impulse reaches the end of an axon, the axon releases a chemical.!This chemical flows across the synapse and stimulates the impulse in the dendrite of the next neuron.
  26. 26. Synapses!When an impulse reaches the end of an axon, the axon releases a chemical.!This chemical flows across the synapse and stimulates the impulse in the dendrite of the next neuron.!Your neurons are adapted in such a way that impulses move in only one direction.
  27. 27. Synapses
  28. 28. Synapses
  29. 29. The Central Ner vous System!The central nervous system is made up of the brain and spinal cord.
  30. 30. The Central Ner vous System!The central nervous system is made up of the brain and spinal cord.
  31. 31. CNS – The Brain
  32. 32. CNS – The Brain!The brain coordinates all of your body activities.
  33. 33. CNS – The Brain!The brain coordinates all of your body activities.
  34. 34. CNS – The Brain!The brain coordinates all of your body activities.!Made of 100 billion neurons
  35. 35. CNS – The Brain!The brain coordinates all of your body activities.!Made of 100 billion neurons!WHAT?!?! 100 billion..... ▪That is absolutely.....
  36. 36. CNS – The Brain!The brain coordinates all of your body activities.!Made of 100 billion neurons!WHAT?!?! 100 billion..... ▪That is absolutely.....!And that is only 10% of all the neurons in the human body.
  37. 37. CNS – The Brain!The brain coordinates all of your body activities.!Made of 100 billion neurons!WHAT?!?! 100 billion..... ▪That is absolutely.....!And that is only 10% of all the neurons in the human body.!The brain is surrounded by a bony skull and 3 membranes and a layer of fluid.
  38. 38. CNS – The Brain
  39. 39. CNS – The Cerebrum
  40. 40. CNS – The Cerebrum!The cerebrum is the largest part of brain
  41. 41. CNS – The Cerebrum!The cerebrum is the largest part of brain
  42. 42. CNS – The Cerebrum!The cerebrum is the largest part of brain!This is where… !thinking takes place !impulses from the senses are interpreted !memory is stored !movements are controlled
  43. 43. CNS – The Cerebrum!The cerebrum is the largest part of brain!This is where… !thinking takes place !impulses from the senses are interpreted !memory is stored !movements are controlled
  44. 44. CNS – The Cerebrum!The cerebrum is the largest part of brain!This is where… !thinking takes place !impulses from the senses are interpreted !memory is stored !movements are controlled!The outer layer, called the cortex, is marked by many ridges and grooves (increasing the surface area).
  45. 45. CNS – The Cerebrum
  46. 46. CNS - Cerebellum
  47. 47. CNS - Cerebellum!What is interpreted in the cerebellum? !Stimuli from the eyes and ears !Stimuli from muscles and tendons
  48. 48. CNS - Cerebellum!What is interpreted in the cerebellum? !Stimuli from the eyes and ears !Stimuli from muscles and tendons!The cerebellum interprets this information and uses it to coordinate voluntary muscle movement, maintain muscle tone, and helps maintain balance.
  49. 49. CNS – The Cerebellum

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