Unit 2 test Flashcards
The peripheral nervous system consists of what
sensory and motor neurons
neurons and their parts
-cell body: cell life support
-dendrite: branching extensions, receives messages
-axon: passes on the messages
-myelin sheath: tissue covering axon
-glial cell: protects neurons
motor neuron
carries information from the central nervous system to the muscles and glands
sensory neuron
at the end of dendrites, theres a synaptic gap, they’re going to interact with neurotransmitters. Carries info from the sense organs to the central nervous system
Interneurons
info is processed between sensory and motor neurons, parts are the somatic and autonomic nervous system
Process of a neuron firing and resetting
When you touch a hot stove a strong stimulus triggers more neurons to fire, like a domino effect. When a body receives stimuli, a sensory neuron is sent to your spine, your spine sends that signal to your brain, and at the same time, it’s being sent back to your motor neuron causing you to pull away.
Nervous system division, parts
-central nervous system:
-peripheral nervous system
how are hormones released
through bloodstream
how are neurotransmitters released
through the synaptic gap
electroencephalogram EEG
electrodes on scalp measure electrical activity in neurons
Magnetoencephalography MEG
measures magnetic fields from the brains natural electrical activity
CT scan
X-rays of the brain can reveal brain damage
PET scan
uses temporary radioactive glucose that goes to your brain and while you preform a task
MRI
uses magnetic feilds and radioactive waves to provide a map of the brain structure
FMRI
measures blood flow to brain, this is the actual function, compares results with MRI
