Terms : Hide Images
| 235978598 | central nervous system | consists of the spinal cord and the brain. This is needed to live. | |
| 235978599 | cerebrospinal fluid | clear, colorless bodily fluid, around and inside the brain and spinal cord. | |
| 235978600 | neurons | a nerve cell, the basic building block of the nervous system. | |
| 235978601 | reflexes | a simple, automatic, inborn responce to a sensory stimulus, such as the knee-jerk responce. | |
| 235978602 | peripheral nervous system | the sensory and motor neurons that connect the central nervous system to the rest of the body. | |
| 235978603 | somatic nervous system | the division of the peripheral nervouse system that controls the body skeletal muscles. | |
| 235978604 | autonomic nervous system | the part of the peripheral nervous system that controls the glads and the musles of the the internal organs | |
| 235978605 | sympathetic nervous system | the divison of the autonomic nervous system that arouses the body, molding its energy in stressful situations. | |
| 235978606 | parasympathtic nervous system | the divison of the autonomic nervous system that calms the body, conserving energy. | |
| 235978607 | cerebral cortex | the intricate fabric of interconnected neural cells that covers the cerebral hemispheres; the body ultimate control and information- processing eachother. | |
| 235978608 | contralateral | pattern in which the left half of the brain controls the right half of the body and the right half of the brain controls the left half of the body. | |
| 235978609 | ipsilateral | situated or affecting the same side. | |
| 235978610 | aphasia | impairment of language, usually caused left hemisphere damage either to broca's area (impairing speaking) or to wernicks area (impairing understanding) | |
| 235978611 | EEG | recording of electrical activity alond the scalp | |
| 235978612 | CAT scan | used to generate a three- dimensional image of the inside of an object from a large series of two dimensional x-ray images taken around a single axis of rotation. | |
| 235978613 | PET Scan | produces a three dimensional image of picture of functional processing in the body(distinguish dead and living cells) | |
| 236017908 | Afferent neurons | a neuron conducting impulses inwards to the brain or spinal cord | |
| 236017909 | efferent neurons | a neuron conducting impulses outwards from the brain or spinal cord | |
| 236017910 | interneurons | connects afferent neurons and efferent neurons in neural pathways. | |
| 236017911 | soma | (cell body) contains the neurons neculeus | |
| 236017912 | dendrites | the bushy, branching extensions of a neuron that receive messages and conduct impulses toward the cell body. | |
| 236017913 | axon | the extension of a neuron ending the branching terminal fibers, though which messages are sent to other neurons or to muscles or glands | |
| 236017914 | myelin sheath | a layer of fatty tissue segmentally encasing the fibers of many neurons; enables vastly greater transmissions speed of neural impulses as the impulse speed of neural impulses as the impulse hops from one node to the rest. | |
| 236017915 | nodes of ranvier | regulary spaces gaps in the myelin sheath around an axon or nerve fiber | |
| 236017916 | terminal buttons | located at the end of the neuron and are responsible for sending the signal on to other neurons | |
| 236017917 | synapse | junction between the axon tip of the sending neuron and the dendrite or the cell body of the recieving neuron | |
| 236083192 | neurotransmitters | chemical messengers that traverse the synaptic gaps between neurons. when released by the sending neurons, neurontrasmitters travel across the synapse and blind to receptor sites on the receiving neuron there by influencing whether it will generate a neural impulse | |
| 236083193 | glial cells | cells in the nervous system that are not neurons but that support, nourish, and protect neurons. | |
| 236083194 | action potential | a neural impulse; a brief electrial change that travels down an axon | |
| 236083195 | absolute refractory phase | the period immediately following the firing of a nerve fiber when it cannon be stimulated no moatter how great a stimulus is applied | |
| 236083196 | resting potential | when a neuron is not sending a signal | |
| 236083197 | reuptake | allows for the recycling of neurontransmitters and regulates the level of neurontransmitter | |
| 236083198 | endocrine system | the bodys "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream. | |
| 236083199 | pituitary gland | the endocrine systems most influential gland under the influence of the hyphothalamus, it regulate's growth and controls other endocrine glands. | |
| 236083200 | serotonin | type of neurotransmitter that is found mainly in the central nervous system. it helps regulate mood, sleep, appetite, learning and memory. | |
| 236083201 | Endorphins | "morphine within"-natural opiate-like neurotransmitters linked to pain control and to pleasure. |
