Unit 3 Vocab + Concepts Flashcards
The scientific study of the links between biological and psychological processes.
biological psychology
A nerve cell; the basic building blocks of the nervous system
Neuron
A neurons bushy branching extensions that receive messages and conduct impulses toward the cell body
Dendrites
The neurori extension that passes messages through its branches to other neurons or to muscles and glands
Axon
Fatty tissue layer segmentally encasing the acorns of some neurons; enables vastly greater transmission speed as neural impulses hop from one sausage like node to the next
Myelin sheath
The neural impulses; brief electrical charge that travels down an axon
Action potential
a period of inactivity after a neuron has fired
Refractory period
The junction between the axon tip of the sending neuron and the dendrite or cell body of the receiving neuron. The tiny gap at this junction is called the synaptic gap or synaptic cleft
Synapse
Chemical messengers that cross the synaptic gaps between neurons. When released by the sending neuron, neurotransmitters travel across the synapse and bind to the receptor sites on the receiving neuron, thereby influencing whether that neuron will generate a neural impulse
Nuerotransmitters
A neurotransmitters re absorption by the sending neuron
Reuptake
F-enables muscle action, learning, and memory
Malfunctions-with Alzheimer’s disease these neurons producing this deteriorate
Acetylcholine (ACh)
F-influences movement, leaning, attention, and emotion
MF- oversupply linked to schizophrenia. Under supply linked to tremors and decreased mobility in Parkinson’s disease
Dopamine
F-affect es mood, hunger, sleep, and arousal
MF- undersupply linked to depression, some antidepressants raise these levels
Serotonin
F-helps control alertness and arousal
MF- undersupply can depress mood
Norepinephrine
F- a major inhibitory neurotransmitter
MF- undersupply linked to seizures, tremors, and insomnia
GABA (gamma-amino uteri called acid)
F-a major excitatory neurotransmitter involved in memory
MF- oversupply can overstimulate the brain, producing migraines and seizures
Glutamate
“Morphine within” -natural opiate like neurotransmitters linked to pain control and to pleasure
Endorphins
A molecule that, bu binding to a receptor site, stimulates a response (in drugs)
Agonist
A molecule that binds to a receptor site and inhibits or blocks a response
Antagonist
The brain and spinal chord make up
The central nervous system
The sensory and motor neurons that connect the central nervous system to the rest of the body
Peripheral nervous system
Bundled axons that form neural cables connecting the central nervous system with muscles, glands, and sense organs
Nerves
Neurons that carry incoming information from the sensory receptors to the brain and spinal chord
Sensory neurons
Neurons that carry outgoing information from the brain and spinal chord to muscles and glands
Motor neurons
Neurons within the Brian and spinal chord that communicate internally and intervene between the sensory inputs and motor outputs
Interneurons
The division of the peripheral nervous system that controls the body’s skeletal muscles. Also called the skeletal nervous system
Somatic nervous system