A & E SYSTEMS Flashcards
Sensory afferent neurons
bring information to the Central Nervous System
Motor efferent neurons
take information away
Central nervous system is made up of the
Brain and the spinal cord
Somatic voluntary neurons
related to skeletal muscle and decision to move particular muscles
Autonomic - involuntary includes both of the
sympathetic and parasympathetic neurons - processes in our body that we don’t have control over
myelin sheath
insuling of the axon, sheath electrically insulates the axons of a neuron and increases the speed of nerve impulse conduction
synapse
region where communication occurs between two neurons or a neuron and a effector cell
endocrine system
endocrine organs secrete hormones
Endocrine cell
circulating hormones, hormone receptors on distant target cells
paracrine cell
paracrine receptors on nearby cells
autocrine cells
autocrine receptors act back on the same cell
acetylcholine
organic chemical that functions in the brain and body of many types of animals and humans as a neurotransmitter. a chemical message released by nerve cells to send signals to other cells, such as neurons, muscle cells and gland cells.
norepinephrine
naturally occurring chemical in the body. both a stress hormone and neurotransmitter - sends signals between nerve cells. - released into the blood as a stress hormone when the brain perceives that a stressful event has happened.
ACTH
Corticotropin
Adrenal Medulla
releases hormones epinephrine and norepinephrine into the blood stream. enhances sympathetic autonomic alarm response
