Nervous and Endocrine System Flashcards
– where nucleus
and other organelles are
located
cell body
includes dendrite and
axons
protoplasmic processes
conduct
nerve impulses
TOWARD the cell
body
dendrite
conduct
nerve impulses
AWAY from the cell
body
axon
axon is covered by
tightly
packed
____
cells
containing
___ as
insulator
schwann cells
myelin
3 different neurons as to number of protoplasmic processes
unipolar neuron
bipolar neuron
multipolar neuron
1 protoplasmic processes
unipolar neuron
2 protoplasmic processes
bipolar neuron
several dendrites and one axon
multipolar neuron
kind of neuron located on the dorsal root ganglion of the spinal cord
unipolar neuron
kind of neuron located on the retina of the eye
bipolar neuron
what kind of neuron is located on the ventral horns of the
gray matter of the
spinal cord
multipolar neuron
types of neuron as to functions
sensory
motor
associative/adjustor
transmit impulses from sensory receptors
of the sense organ to nerve
center (CNS
sensory neuron
transmit impulses
from the nerve center to the
effectors (muscles or glands)
motor neuron
connects sensory and motor
neurons; located in nerve center,
also called interneuron
adjustor or associative neurons
– composed of actively
dividing cells supporting the neurons
of the nervous system
neuroglia
neuroglia that connect neurons and capillaries
astrocytes
dispose dead cells,
bacteria, etc
microglia
– line the fluid-filled
cavities of CNS for protection
ependymal cells
– form the
myelin sheath around the fibers
oligodendrocytes
a type of glial cell
that surrounds neurons, keeping
them alive and sometimes
covering them with a myelin
sheath
schwan cells
situated between
the external lamina and
sarcolemma.
are precursors to skeletal muscle
cells and are responsible for the
ability of muscle tissue to
regenerate
satellite cells
maintain blood barrier, controlling levels of neurotransmitter around synapses
regulate ion and providing metabolic support
astrocytes
line spinal cord and ventricles of the brain
involved in producing cerebrospinal fluid (CSF)
ependymal cells
myelinate CNS, axons, provide structural framework
oligodendrocytes
brain’s immune cells, remove dead cells and pathogens by phagocytosis
microglia
surround neuron cell bodies in ganglia, regulate neurotransmitter levels
sattelite cells
myelinate neurons in PNS, maintenance and regeneration of neurons after injury
Schwann cells
dorsal and ventral
nerves that arises from spinal cord
spinal nerves
root that have ganglions
dorsal root
roots that
connect spinal nerve to spinal cord
dorsal and ventral roots
what structure does the dorsal and ventral root connect spinal nerve to spinal cord
ramus communicanus
branch of spinal nerves
dorsal ramus
ventral ramus
branches of
spinal nerves that supplies
epaxial muscles
dorsal ramus
– branches of
spinal nerves that supplies
hypaxial muscles and skin
ventral ramus
- functional types of neurons in Spinal
nerve
somatic afferent
somatic efferent
visceral afferent
visceral efferent
sensory from
general cutaneous receptors and
propriocepetors
kind of sensory
somatic afferent
– motor to
skeletal muscles
kind of neurons in spinal nerves
somatic efferent
sensory from
receptors in the viscera
neurons in spinal nerves
visceral afferent
motor to
smooth, cardiac muscles, and
glands
kind of neurons in spinal nerves
visceral efferent
amphioxus contain thre kinds of fibers
somatic
visceral
cisceral
nerve bodies of
sensory neurons are
located in the spinal
cord
which organism
amphioxus
NO ganglia in spinal
nerve
which organism
amphioxus
Dorsal and ventral
nerves of each body
segment joins outside
the vertebral column
hagfish, fish, and amphibians
Spinal nerves divide
into 3 rami
what organism
hagfish, fish, and amphibians
serving structures
of epaxial origin
dorsal ramus
serving
appendages and
structures of
hypaxial origin
ventral ramus
serving structures
derived from the
hypomere
visceral ramus
dorsal and ventral
roots join inside the
vertebral column
which group of animals
amniotes
- each dorsal root is at
the same level
corresponding ventral
root
which group of animals
amniotes
– classified in one of
three general categories:
series with dorsal roots of spinal
nerves join at the brainstem at a
LATERAL level
in series with ventral spinal
nerves join at the brainstem at a
VENTRAL level
no counterpart in spinal series
because its nerves serve
structure that are peculiar to the
head (nose, eye, ear, lateral line
system)
cranial nerves
include mixed nerves,
sensory, and motor neurons
including nerves O, V. VII, IX, X,
XI
series with dorsal roots of spinal
nerves join at the brainstem at a
LATERAL level
containing somatic motor
fibers, and supply
branchiometric muscles,
branchiometric nerves
includes nerves III, IV, VI, XII
in series with ventral spinal
nerves join at the brainstem at a
VENTRAL level
sensory fibers including
nerves I, II, VII, VIII, IX
no counterpart in spinal series