Brain
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35 terms
Terms | Definitions |
|---|---|
 Nervous System | Recieves and relays messages |
| Action Potential | Reversal of charge |
| Synapse | gap between neurons |
| Hypothalamus | anger, thirst, hunger |
| Neuron | carries messages |
| Cerebrum | thinking |
| Reflex Arc | quick automatic response, sensory receptor, sensory neuron, motor neuron and effector |
| Dendrite | receives messages from the environment |
| Axon | carries massages away from cell body |
| Threshold | minimum amount needed to send signal |
| Cerebellum | controls muscles |
| Neurotransmitter | chemical that carries signal across gap |
| Sensory Neuron | In reflex arc, Heat, cold, pressure outside the body and within to the brain |
| Resting Potential | electrical charge across the membrane |
| Brain stem | Pons, medulla oblongata, breathing and heart rate |
| Motor Neuron | in reflex arc, Joint control messages |
| Thalamus | switching station inside the brain (railroad station) |
| Interneuron | connects sensory and motor neurons |
| Somatic | controls voluntary muscular systems |
| Central NS | Spinal cord and brain |
| Peripheral NS | Connects CNS, contains gangila |
| Autonomic | involuntary, heart rate, digestion |
| Impulse | Movement of action potential along a nerve in response to touch, pain, cold ect. |
| Sympathetic | mobilize NS, fight or flight |
| Receptor | molecule at surface of cell |
| Medulla Oblongata | controls digestion, heart and blood vessel function |
| Parasympathetic | rest and digest |
| Effector | Muscle, in reflex arc |
| Axon Terminal | end of axon, holds the neurotransmitter |
| Cell Body | Largest part of neuron, contains nucleus |
| Cerebral Medulla | Layer below on cerebrum, white matter, connects/brings info to rest of brain |
| Reflex | Quick automatic response to a stimulus |
| Myelin | Insulating membrane surrounding the axon |
| Cerebral Cortex | Outer layer of cerebrum, grey matter, thinking |
| Pons | Help regulate heart rate, swallowing, breathing, and body temp. |
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