Nervous System Flashcards
one of the most complicated structures in the animal kingdom, containing billions of neurons
nervous system
brain and spinal cord; central processing unit of the body
central nervous system
the rest of the nerves of the body
peripheral nervous system
largest central organ of the nervous system
brain
anterior part of the brain
forebrain
parts that make up the forebrain
cerebrum, hypothalamus, thalamus
smaller and central part of the brain
midbrain
parts that make up the midbrain
tectum, tegmentum
central region of the brain
hindbrain
parts that make up the hindbrain
cerebellum, medulla, pons
cylindrical bundle of nerve fibers within the spine
spinal cord
dark, butterfly-shaped region of the brain made up of nerve cell bodies
gray matter
surrounds gray matter in the spinal cord and contains cell coated in myelin
white matter
connects different parts of the body to the CNS
peripheral nervous system
responsible for transmitting messages from tissues/organs to the CNS
afferent nerve fibers
conveys messages from CNS to corresponding peripheral organ
efferent nerve fibers
part of the PNS that controls voluntary actions
somatic neural system
part of the PNS that controls involuntary actions
autonomic neural system
part of the ANS that stimulates the body’s fight or flight response
sympathetic nervous system
part of the ANS that stimulates the body’s rest and digest and feed and breed responses
parasympathetic nervous system
part of brain that controls thinking, memory, behavior, and movement
frontal lobe
part of the brain that controls hearing, learning, and feelings
temporal lobe
part of the brain that controls breathing, heart rate, and temperature
brain stem
part of the brain that controls language and touch
parietal lobe
part of the brain that controls sight
occipital lobe
part of the brain that controls balance and coordination
cerebellum
center of emotions
limbic system
contains the nucleus and serves as the cell support center
cell body or soma
passes messages away from the cell body
axon
receives messages
dendrites
insulates axon and speeds up neural impulse
myelin sheath
3 parts of the brain stem
midbrain, medulla, pons