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-Basic cell of the Nervous system
-communicates with other neurons,sensory organs, muscles and glands |
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Neuron's bushy,branching extensions that receive messages & conduct impulses toward the cell body
- part of neuron |
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The neuron's extension that passes messages through its branching terminal fibers that form junctions with other neurons, muscles, or glands
-part of neurons |
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| A neural impulses; a brief electrical charge that travels down an axon. |
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To increase the speed at which impulses propagate along the myelinated fiber.
-part of neuron |
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| The level of stimulation required to trigger a neural impulse. |
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Definition
The junction between the axon tip of the sending neuron & the dendrite or cell body of the receiving neuron.
-Discovered by Charles Sherrington |
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| Chemical messengers that cross the synaptic gaps between the neurons and bind with receptors. |
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Definition
Lessen pain and boost mood
Malfunctions: Intense discomfort |
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Definition
The brain and spinal cord
- information highway |
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Term
| Peripheral nervous system |
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Definition
The sensory & motor neurons that connect the CNS to the rest of the body
-2 components= Somatic and Autonomic nervous system |
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Term
| Sympathetic nervous system |
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Definition
| the divison of the autonomic system that arouses, mobilizing its energy in stressful situations |
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Definition
| Bundled axons that form neural connecting the CNS with muscles,glands, and sense organs. |
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| Carry incoming information from the brain and spine to the muscles and glands. |
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| In the brain and spine that communicate internally between the sensory inputs and motor outputs. |
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| Carry outgoing info from the brain & spine to the muscles and glands. |
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Definition
Controls the glands and the muscles of internal organs
-part of the PNS |
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Definition
The division of the PNS that controls the body's skeletal muscles
-part of the PNS |
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| Parasympathetic nervous system |
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Definition
responsible for stimulation of "rest-and-digest" activities that occur when the body is at rest, including sexual arousal, salivation, lacrimation (tears), urination, digestion, and defecation.
-part of ANS |
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Definition
| the body's "slow" chemical communication system; a set of glands that secrete hormones into the bloodstream |
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Definition
| Chemical messengers created by the endocrine glands |
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| Most influential gland, regulates growth & controls other endocrine glands. |
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| biology underlies our behavior & mental process. |
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Term
| How are neural impulses generated? |
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Definition
Impulses travels down the axon until reaching the synapse
-stimulates the neurotransmitters and they cross the synapse gap and bind to the receiving neuron. |
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Term
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Definition
1.Sensory neurons carry messages from the body's tissues and sensory receptors inward to the brain spine.
2.CNS sends intrusctions out to the body's tissues via the motor neurons
3.Interneurons process info within the CNS. |
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Term
| Acetylcholine (neurotransmitter) |
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Definition
Enables muscle action, learning and memory
Malfunctions: Alzheimer's disease |
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| Dopamine (neurotransmitter) |
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Definition
Influences awarness, learning, and memory
Malfunctions: Schizopharania |
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| Serotonin (neurotransmitter) |
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Definition
Affects mood, hunger, sleep & arousal
Malfunctions: depression |
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| Norepinephrine (neurotransmitter) |
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Definition
Helps control alertness and arousal
Malfuntions: depression |
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Term
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Definition
| Increase neurotransmitter effects |
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Term
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Definition
| Block neurotransmitter effects |
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