Psych Midterm Flashcards
(400 cards)
parts of neurons
soma, dendrites, axon, axon buttons, synapse, nodes of ranvier, myelin sheath
glial cells
cells that are a structure for neurons to latch onto; regulate neuron nutrients, communication, death
dendrites
recieve messages and neurotransmitters
soma
main cell body with nucleus
axon
electrical impule akes message and sends next message, fibrous
nodes of ranvier
breaks in the myelin sheath of the axon so impulses move faster
neuron firing
all or nothing; starts charged, thriugh diffusion positive ions are absorbed into neuron and the charge is reversed (action potential); the ability to diffuse is regulated by voltage applied to the membrane; after firing positive Na ions are pumped out again
neuron and neurotransmitter interaction
axon buttons have synaptic besticles containing the transmitters; when fired, vesticles release transmitters and a process called “reuptake” lets them take back excess transmitter molecules; the neurotransmitter is then recepted by dendtrites
agonist neurotransmitter
mimics transmitter or enhances it to get more of a reaction
antagonist neurotransmitter
chemical that blocks receptors in the dendrites and prevents neurotransmitter reaction
central nervous system
brain and spinal cord
spinal cord
connects brain to peripheral nervous system
Peripheral nervous system
autonomic system and somatic system
Autonomic nervous system
automatic regulation of body; parasympathetic and sympathetic systems
Somatic nervous system
carries senseoy info and controls skeletal system; sensory and motor systems
Parasympathetic nervous system
maintains body functions under normal conditions and works to conserve energy
Sympathetic nervous system
prepares body to react to stress, uses a lot of energy
Sensory nervous system
carries messages from senses to CNS
Motor nervous system
carries messages from CNS to skeletal system
interneurons
connect the motor system to the sensory; within the inner part of the spinal cord; responsible for reflexes
pituitary gland
master of the endocrine system; directs hormone production from hypothalamus instructions
pineal gland
responsible for biological rhythms and melatonin (sleep)
thyroid gland
regulates growth and metabolism
pancreas
controls blood sugar