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nervous
nervous system
| Term | Definition |
|---|---|
| brain | coordinates most body activities, and is the control center for the body as well as thought, emotion, and judgement. The brain is divided into four lobes: frontal, parietal, occipital, and temporal. |
| spinal cord | provides a pathway for nerve impulses travelling to and from the brain, and extends from the base of the brain to the lumbar vertebra through the vertebral column. |
| peripheral nerves | includes 12 pairs of cranial nerves and 31 pairs of spinal nerves branching off from the spinal cord. carries nerve signals between the body and the brain. |
| neuron | functional unit of the nervous system |
| dendrites | has multiple branching structures |
| nucleus | directs cellular activities |
| cytoplasm | produces neurotransmitters and energy for the neuron. |
| axon | stores neurotransmitters |
| Central nervous system (CNS) | includes the brain and spinal cord. |
| Peripheral nervous system (PNS) | is made of peripheral nerves found throughout the body. |
| somatic nervous system | part of the PNS. controls the body's voluntary (skeletal) muscles. |
| autonomic nervous system | controls the body's autonomic functions like breathing and digestion. |
| sympathetic branch | controls the "fight or flight" response to stress. |
| parasympathetic branch | returns the body to resting state after the stress has been resolved and is responsible for maintaining homeostasis. |
Created by:
elshalance
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