| Question | Answer |
|---|---|
| What is the Nervous system? | -a collection of organs that work together to gather and interpret information about the body's internal and external environment, and respond to that information |
| Name the 2 subdivisions of the Nervous system. | 1)The Peripheral Nervous System (PNS) 2)The Central Nervous System (CNS) |
| Explain the Peripheral Nervous System (PNS). | -it includes nerves (communication paths that connect the entire body to the brain and spinal cord (CNS)) |
| Explain the Central Nervous System (CNS). | -it includes the brain and spinal cord -it processes all incoming and outgoing messages |
| Name the structures of the Nervous System. | 1)Neuron 2)Sensory Neuron 3)Motor Neuron 4)Brain 5)Spinal Cord 6)Reflex |
| What is a Neuron? | -a type of cell that transfers electrical messages throughout the body |
| What is a Dendrite? | -it receives messages -it is many short branched extensions |
| What is an Axon? | -it sends messages -it is long |
| What is an Impulse? | -an electrical message that travels through the neuron |
| What is a Synapse? | -a space between one neuron and another |
| What is a Sensory Neuron? | -a special neuron that gathers information about what is happening in and around your body -It sends this information to the brain -INCOMING |
| What is a Motor Neuron? | -a special neuron that sends messages from the brain and spinal cord to the body -motor=move -OUTGOING |
| What is a Receptor? | -a specialized dendrite that receives sensory messages. -the first dendrites in the path to your brain |
| Explain what receptors in your stomach do. | -they tell your brain when you are hungry or full |
| What is the Nervous System's largest organ? | -the brain |
| What are the 3 parts of the brain? | 1)cerebrum 2)cerebellum 3)Medulla |
| What is the largest part of the brain? | -the cerebrum |
| Name the 2 parts or hemispheres of the cerebrum. | 1)the left hemisphere 2)the right hemisphere |
| What does the left hemisphere do? | -it controls the right side of the body |
| What activities does the left hemisphere control? | -it controls speaking, reading, writing, problem solving |
| What does the right hemisphere do? | -it controls the left side of the body |
| What activities does the right hemisphere control? | –it controls imagination, appreciation, creativity |
| What is the function of the cerebellum? | -it receives sensory impulses and controls balance |
| What does the medulla do? | -it connects the brain to the spinal cord -it is involved in breathing, blood pressure and heart rate |
| What is the spinal cord responsible for? | -it sends information to and from the brain |
| Describe the spinal cord. | -it is as big around as your thumb -it is surrounded by protective bones called vertebrae |
| What is a reflex? | -ii is involuntary action that protects you -it is a shortcut from the spinal cord to your muscles -by the time your brain gets the signal, you are already out of danger |
| Name some diseases of the Nervous System. | 1)Alzheimer's 2)Multiple Sclerosis 3)Parkinson's 4)Concussion |
