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51 Cards in this Set

  • Front
  • Back
describe function of the endocrine system
regulates and manages everything from physical growth to stree response
Pituitary gland
master gland; regulates other endocrine glands; releases horomones
Thyroid Gland
produces thyroxine; a disorder affects metabolism (weight gain)
horomone
stir up; excite
Adrenal Glands accomplish...
produces epinephrine
two subsystems of nervous system
PNS and CNS
PNS
carries messages to and from CNS
CNS
main processesing system of information
parts of PNS
somatic, autonomic
parts of CNS
brain and spinal cord
afferent neurons
sends messages to the brain
efferent neurons
messages from brain to spinal cord
neuron
single cell and the building block of the nervous system
parts of a neuron
soma, dendrites, axon
function of dendrites
receive signals and carry them to cell body, sends them to axon
3 characteristics of neurons
dont grow back; damage is permanent; threshold of excitation
threshold of excitation
neurons fire when dendrites are stimulated; then depolarized; positively charged particles pushed outside neuron; neuron returns to its initial resting state
action potential of neurons
neuron is depolarized: neuron is stimulated or resting state is disturbed
neurotransmitters
chemical substance in axon
types of neurotransmitters
Acetycholine; Norepinephrine; Seratonin; Endorphins; Dopamine
somatic nervous system
respons to external senses (sight, taste, hearing..)
autonomic nervous system
controls vital and automatic activities (heart rate, blood pressure, internal organs)
importance of somatic
processes information; carries info from sense organs to the brain (what causes us to see an car coming and move)
parasympathetic nervous system
calms things down, moves heartbeat to normal after emergency
3 parts of the brain
hindbrain, midbrain, forebrain
hindbrain
holds the cerebellum, medulla, the pons; interprets signals and cause the body to immediately act
forebrain
largest, most complicated part of the brain
higher thinking process
takes place in forebrain;
thalamus
sensory information
function of dendrites
receive signals and carry them to cell body, sends them to axon
3 characteristics of neurons
dont grow back; damage is permanent; threshold of excitation
threshold of excitation
neurons fire when dendrites are stimulated; then depolarized; positively charged particles pushed outside neuron; neuron returns to its initial resting state
action potential of neurons
neuron is depolarized: neuron is stimulated or resting state is disturbed
neurotransmitters
chemical substance in axon
types of neurotransmitters
Acetycholine; Norepinephrine; Seratonin; Endorphins; Dopamine
somatic nervous system
respons to external senses (sight, taste, hearing..)
autonomic nervous system
controls vital and automatic activities (heart rate, blood pressure, internal organs)
importance of somatic
processes information; carries info from sense organs to the brain (what causes us to see an car coming and move)
parasympathetic nervous system
calms things down, moves heartbeat to normal after emergency
3 parts of the brain
hindbrain, midbrain, forebrain
hindbrain
holds the cerebellum, medulla, the pons; interprets signals and cause the body to immediately act
forebrain
largest, most complicated part of the brain
higher thinking process
takes place in forebrain;
thalamus
sensory information
hypothalamus
motivation, emotion; regulates body temp
RAS
Reticulating Activating System
Limbic System (parts)
Thalamus; Hypothalamusl; Amygdala; Hippocampus
Pancreas
produces insulin and glucogen; controls sugar metabolism
Thymus Gland
behind breastbone; important to immune system
Testes
produce sperm and testosterone
Ovaries
produce estrogen and progesterone