Central Nervous System: The brain and the spinal cord
Peripheral Nervous System: All nerves that are not encased in bone
Peripheral Nervous System: All nerves that are not encased in bone
- Everything but the spinal cord and brain
- Is divided into 2 categories...Somatic and Autonomic
- Somatic Nervous System
- Controls voluntary muscle movement
- Use motor (efferent) neurons
- Autonomic Nervous System
- Controls the autonomic functions of the body
- Divided into two categories...sympathetic and the parasympathetic
1. Fight or flight response
2. Automatically accelerates heart rate, breathing, , dilates pupils, slows down digestion.
* Parasympathetic Nervous System
1. Automatically slows the body down after a stressful event.
2. Heart rate and breathing slow down, pupils constrict and digestion speeds up.
Reflexes: Normally, sensory (efferent) neurons take info up through spine to the brain.
2. Heart rate and breathing slow down, pupils constrict and digestion speeds up.
Reflexes: Normally, sensory (efferent) neurons take info up through spine to the brain.
- Some reactions occur when sensory neurons reach just the spinal cord.
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