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38 Cards in this Set
- Front
- Back
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interneurons
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neurons that make up the brain and spinal cord
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adrenal glands
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-on kidneys
-secrete the hormone adrenaline in time of emergency or stress -increases: heart rate, breathing rate, sweating... |
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cerebrum
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-front of brain
-controls: voluntary activities, memory/thinking/learning, senses |
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hypothalmus
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-brain
-produces hormones that control the pituitary gland |
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terminal branches
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send impulse to next neuron
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parasympathetic NS
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-controls organs in times of rest
-rest&digest |
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sympathetic NS
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-controls organs in times of stress
-fight or flight |
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impulse
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electric and chemical message
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sensory neurons
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-carry impulses from receptors to brain and spinal cord
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synapse
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-space between neurons
1. impulse reaches terminal branches 2. neurotransmitters (chemicals) released into synapse 3. neurotransmitters carry impulse across synapse 4. impulse starts and travels over to next neuron |
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schwann cell
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-makes impulse travel faster (by producing myelin)
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autonomic NS
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leads to involuntary organs
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axon
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carries impulse away from cell body
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negative feedback
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-maintains homeostasis
-the level of one hormone in the blood inhibits or stimulates the production of another hormone |
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somatic NS
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leads to voluntary organs
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target cell
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-cells hormones travel to
-have receptors for specific hormones -no reeceptor means no effect |
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neuron
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nerve cell
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regulation
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-control and coordination (sendws messages)
-helps maintain homeo stasis |
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response
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reaction to a stimulus
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cell body
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-cyton
-contains nucleus |
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thymus
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-behind sternum
-larger in babies -> gets smaller -carries out immune system function till body takes over then makes WBCs |
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dendrites
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recieve impulse
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gland
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organ that produces and releases a substance
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cerebellum
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controls coordination and balance
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spinal cord
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-interneuron
-pathway between brain and rest of body -controls reflexees -protected by spinal columnn -central NS |
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stimulus
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a change in the environ ment that causes a response
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diabetes
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-body doesnt produce enough insulin
-blood sugar is too high |
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how do the nervous system and endocrine system work together???
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1. NS picks up info and interprets it
2. nerves send impulses to glands 3. glAnds secrete hormones into blood |
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effector
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-causes a response
-muscle or gland |
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thyriod
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-in throat
-thyroxine=regulates rate of metabolism |
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hormone
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chemicals that effect activities of other cells (aka chemical messenger)
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parathyriod
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-on thyriod
-parathormone=regulattes level of calcium in bllood |
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motor neurons
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carry impulses from interneurons to effectors to carry out a response
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medullla
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controls involuntayr activities
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receptor
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-picks up stimuli
-sense organs |
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peripheral NS
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-nerves that branch off brain and spinal cord
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reflex arc
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-path of an impulse
-simple response to a stimulus receptor, sensory neurons, interneurons, motor neurons, effector |
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islets of langerhans
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-pancreas
-insulin=lowers blood sugar level -glucagon=increases blood sugar level |
