1. The Nervous System

2. Functions of the Nervous System 1.the center of all thought, learning and memory

3. 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

4. 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 3.keeps us in touch with our internal and external environment

5. Central Nervous System 1.Made up of brain and spinal cord

6. 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

7. 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) Cerebellum- coordinates actions of muscles and helps keep your balance

8. 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) Cerebellum- coordinates actions of muscles and helps keep your balance a) Brainstem- controls homeostasis and coordinatesinvoluntarymuscles

9. What is this part of the brain called? 12345 10 a)Cerebrum b)Cerebellum c)Brain stem d)Spinal cord

10. What is the function of the brain stem? 12345 10 a)Controls homeostasis & voluntary muscles b)Controls senses & voluntary muscles c)Controls balance & coordinates muscles d)Controls homeostasis & involuntary muscles

11. When you feel hungry, what function is your nervous system trying to carry out? 12345 10 a)Maintaining homeostasis b)Moving your body c)Sensing your environment d)Keeping your balance

12. Nerve Cells Nerve cells are called neurons Impulse- a message carried by a neuron Synapse- the small space that an impulse jumps between neurons

13. 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)

14. Types of Neurons 2.Motor neurons: stimulate muscle cells throughout the body includes muscles of the heart, diaphragm, intestines, and bladder

15. Types of Neurons 3.Interneurons: connect other neurons all neurons in the central nervous system (brain, spinal cord) are interneurons

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

17. What is an impulse? 12345 10 a)A nerve cell b)A message carried by neurons c)The space between two neurons d)A reflex

18. What is this structure called? 12345 10 a)Axon b)Synaptic terminal c)Nucleus d)Dendrite

19. What does a motor neuron stimulate? 12345 10 a)Brain cells b)Sensory organs c)Muscle cells d)Sensory neurons

20. Which is not true about a reflex? 12345 10 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.