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HESI A&P Nervous System
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What does the nervous system essentially consists of?
Brain, Spinal Cord, & Nerves
This system allows us to perceive and _______ to internal & external environments.
Respond
All actions of the nervous system depend on the transmission of _______ impulse over neurons.
nerve
What is the functional unit of the Nervous System??
Neuron
Dendrites transmit nerve impulse _______ the cell body.
Towards
Axons transmit nerve impulse _____ from the cell body.
Away
What is the PNS (Peripheral Nervous System) composed of?
All the nerves that transmit nerve impulses towards the CNS (Central Nervous System).
Sensory (Afferent) neurons transmit nerve impulses
Towards
or
Away
from the CNS?
Towards, to be processed by the brain.
Motor (Efferent) neurons transmit nerve impulses
Towards
or
Away
from the CNS?
Away, it transmits nerve impulse to
effector
organs
such as muscles, glands, and digestive organs.
Sensory Neurons are...
Afferent
Motor Neurons are...
Efferent
What is the CNS (Central Nervous System) composed of?
Brain & Spinal Cord
What is the CEREBRUM associated with?
Movement & Sensory Input
What is the CEREBELLUM associated with?
Muscular Coordination
What is the MEDULLA OBLONGATA associated with?
Controls many
vita
l
functions such as respiration and heart rate.
How long is the Spinal Cord?
~18 in.
From where to where does the Spinal Cord extend?
From the base of skull to the 1st or 2nd Lumbar Vertebra (L1 or L2)
How many Nerves exit the Spinal Cord?
31 pairs (62)
What are Simple (Spinal) Reflexes?
They are those in which nerve impulses travels through the
Spinal Cord ONLY
and
DO
NOT reach
the
Brain.
Sensory (Afferent) impulses enter the ______ horns of the spinal cord.
Dorsal
Motor (Efferent) impulses leave through the _______ horns of the spinal cord.
Ventral
Author
karla14449
ID
195516
Card Set
HESI A&P Nervous System
Description
Nervous system portion of the A&P HESI exam
Updated
2013-01-30T00:12:23Z
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