nervous system Flashcards
one of the 2 major control system of the body together with endocrine system
nervous system
nervous system is made up of?
brain
spinal cord
nerves
sensory receptors
the 5 functions of nervous system
maintaining homeostasis
receiving sensory input
integrating information
controlling muscles and glands
establishing and maintaining mental activity
2 divisions of nervous system
central nervous system
peripheral nervous system
Composed of the Brain and the Spinal Cord
central nervous system
located within the skull
brain
located within the vertebral
canal
spinal cord
Major site for processing information,
initiating responses, and integrating mental
process.
central nervous sytem
what is foramen magnum
connects the brain and spinal cord
Consists of all the nervous tissue outside CNS
peripheral nervous system
peripheral nervous system is composed of;
sensory receptors
nerves
ganglia
plexuses
endings of neuron. Specialized cells that detect temperature, pain, touch, pressure, light, sound, odor, and other
stimuli.
sensory receptors
Located in the skin, muscles, joints, internal organs,
and special sensory organs such as eyes and ears.
sensory receptors
bundle of fibers called axons and
their sheaths, connects the CNS to sensory receptors,
muscles, and glands.
nerves
how many pairs of cranial nerves that originates from
the brain?
12
how many pairs of spinal nerves that originate from the
spinal cord?
31
collection or clusters of neuron cell
bodies located outside the CNS or throughout
the body and carries nerve signals
ganglia
extensive networks of axons and
in some cases, neuron cell bodies located
outise the CNS.
plexuses
2 subdivision of PNS
sensory division - afferent
motor division-efferent
Transmits electrical signal called action potentials, from the sensory receptors
to the CNS.
sensory division
Neurons that carry sensory impulses from sensory organs to the CNS are known as
sensory neurons
sensory neurons usually found in
eyes, skin, tongue, nose
Transmits action potential from the CNS to effector organs such as muscles and glands
motor division
A neuron that carries motor impulses from the CNS specific effectors is known as
motor neurons
motor neurons is found in
muscles and glands
2 subdivisions of motor division
somatic-voluntary
autonomic-involuntary
2 subdivisions of autonomic
sympathetic
parasympatheic
2 subdivisions of autonomic
sympathetic
parasympathetic
most active type of autonomic division
sympathetic
the resting function type of autonomic division
parasympathetic
