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voc words 3/6/2018
aprendercelo
Term | Definition |
---|---|
Regulation | is defined as any process that modulates the frequency, rate or extent of any biological process, quality or function. |
Irritability | is the excitatory ability that living organisms have to respond to changes in their environment. |
Impulse | The signal that travels along the length of a nerve fiber and ends in the release of neurotransmitters. |
Stimulus | a thing or event that evokes a specific functional reaction in an organ or tissue. |
Response | any behavior of a living organism that results from an external or internal stimulus. |
Receptor | an organ or cell able to respond to light, heat, or other external stimulus and transmit a signal to a sensory nerve. |
Neuron | a specialized cell transmitting nerve impulses; a nerve cell. |
Effector | A nerve ending that carries impulses to a muscle, gland, or organ and activates muscle contraction or glandular secretion. |
Cell body | the nucleus-containing central part of a neuron exclusive of its axons and dendrites |
Dendrites | a short branched extension of a nerve cell, along which impulses received from other cells at synapses are transmitted to the cell body. |
Cell body | the nucleus-containing central part of a neuron exclusive of its axons and dendrites |
axon | the long threadlike part of a nerve cell along which impulses are conducted from the cell body to other cells. |
meninges | the three membranes (the dura mater, arachnoid, and pia mater) that line the skull and vertebral canal and enclose the brain and spinal cord. |
cerebrum | the principal and most anterior part of the brain in vertebrates, located in the front area of the skull and consisting of two hemispheres, |
cerebellum | the part of the brain at the back of the skull in vertebrates. Its function is to coordinate and regulate muscular activity. |
Medulla oblongata | the continuation of the spinal cord within the skull, forming the lowest part of the brainstem and containing control centers for the heart and lungs. |
Central nervous system (CNS) | the part of the nervous system which in vertebrates consists of the brain and spinal cord, |
Peripheral nervous system (PNS) | That portion of the nervous system that is outside the brain and spinal cord. |
meninges | the three membranes (the dura mater, arachnoid, and pia mater) that line the skull and vertebral canal and enclose the brain and spinal cord. |
neurotransmitters | a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, causes the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure. |