Ap Psych Unit 3 biology + sleep stuff; matching quiz Flashcards
dendrites
neurons branching extensions that receive and integrate messages
myelin sheath
enables greater transmission speed as neural impulses hop from one node to the next
Protect+move faster
action potential
a brief electrical charge that travels down an axon
refractory period
a brief resting pause that occurs after a neuron has fired
reuptake
the reabsorption by a neuron of a neurotransmitter
agonist
molecule that increases a neurotransmitters action
axon
neuron extension that passes messages through its branches to other neurons
all-or-none response
neurons reaction to either firing (at full strength) or not firing
endorphins
natural opiate-like neurotransmitters linked to pain control and to pleasure
central nervous system (CNS)
brain and spinal cord
sympathetic nervous system (SNS)
division of the autonomic system that arouses the body
hormones
chemical messengers that travel through the bloodstream and affect other tissues
pituitary gland
regulates growth and controls other endocrine glands
autonomic nervous system (ANS)
peripheral nervous system part, controls the glands and muscles of internal organs
sensory (afferent) neurons
carry info from the body’s tissues & sensory receptors to brain and spinal cord
adrenal glands
secrete hormones that help arouse the body in times of stress
motor (efferent) neurons
carry outgoing info from the brain and spinal cord to the muscles and glands
endocrine system
set of glands that secrete hormones into the bloodstream
EEG (Electroencephalogram)
amplified recording of the waves of electrical activity across the brain’s surface
PET scan
detects where a radioactive form of glucose goes while the brain does a task