Biological Bases of Behavior Flashcards
neuroanatomy
the study of the parts and function of neurons
neurons
individual nerve cells that make up our entire nervous system
dendrites
rootlike parts of the nerve cell that stretch out from the cell body; grow to make synaptic connections with other neurons
cell body (soma)
contains the nucleus and other parts of the cell needed to sustain its life
axon
wirelike structure ending in the terminal buttons that extends from the cell body
myelin sheath
a fatty covering around the axon that speeds neural impulses
terminal buttons
also called: end buttons, terminal branches of axon, synaptic knobs
neurotransmitters
chemicals contained in terminal buttons that enable neurons to communicate
synapse
the space beween the terminal buttons of one neuron and the dendrites of the next neurons
action potential
the local voltage change across the cell wall as a nerve impulse is transmitted
function of acetylcholine
motor movement
lack of acetylcholine
Alzheimer’s disease
function of dopamine
motor movement and alertness
lack of dopamine
Parkinson’s disease
overabundance of dopamine
schizophrenia
function of endorphins
pain control; involved in addictions
function of serotonin
mood control
lack of serotonin
associated with clinical depression
afferent neurons
neurons that take information from the senses to the brain
interneurons
in the brain or spinal cord, neurons that take messages and send them elsewhere in the brain or spinal cord
efferent neurons
neurons that take information from the brain to the rest of the body
Central Nervous System
consists of the brain and spinal cord; nerves encased in bone
Peripheral Nervous System
consists of nerves not encased in bone
Somatic Nervous System
controls voluntary muscle movements
Autonomic Nervous System
controls the automatic functions of our body
Sympathetic Nervous System
part of the Autonomic Nervous System