Worksheet 12-15 Flashcards
has three functions: sensory, integrative, motor
nervous system
function of NS that senses changes (stimuli) within and outside the body
sensory
function of NS that analyzes the sensory information, store some aspects, and make decisions
integrative
function of NS that is responsible for responding to stimuli by initiating muscular contractions or glandular secretions
motor
function in the transmission of impulses and coordination of responses in a frog
nervous system
composed of the brain and the spinal cord
central nervous system
encased in vertebra, connect to parts of the body by spinal nerves
spinal cord
composed of spinal and cranial nerves
peripheral nervous system
connected from the brain to the parts of head and abdomen
cranial nerves
connects the spinal cord to parts of the body
spinal nerves
how many cranial nerves are there
10 pairs
how many pairs of spinal nerves are there
10 pairs
organs that perceive and transmit environmental changes to the CNS
sense organs
sense organ for sense of touch
skin
sense organ for sense of sight
eyes
sense organ for sense of smell
nose
sense organ for sense of hearing and equilibrium
ears
sense organ for sense of taste
tongue
function as the orchestrating and regulating centers of the nervous system, from anterior towards posterior:
central nervous system
enumerate parts of the brain from anterior towards posterior
Telencephalon
Diencephalon
Mesencephalon
Metencephalon
Myelencephalon
consist of paired olfactory lobes and cerebral hemispheres
telencephalon
each cerebral hemisphere contains a cavity known as this
lateral ventricles
Also known as the first and second ventricle
lateral ventricles
centers for association memory
cerebral hemisphere
located between the optic lobes and posterior to the cerebral hemispheres
diencephalon
Functions in balance, vision, and spontaneous movement
diencephalon
part of the diencephalon where there is a small epiphysis of the pineal gland
dorsal part
part of the diencephalon where there is a hypophysis of the pituitary gland
ventral part
formed by the crossing fibers of the optic nerves
optic chiasma
located posteriorly to the optic chiasma
infundibulum
the midbrain, the center for visual coordination
mesencephalon
part of the mesencephalon where there are rounded optic lobes with optic ventricle within
dorsal part
third and fourth ventricle along with the ventricles of the mesencephalon make up the
Aqueduct of Sylvius
Structurally a dorsal transverse fold ridge
metencephalon
funnctions in equilibrium and coordinated movements
metencephalon
where the medulla oblongata is located in this brain part
myelencephalon
Narrows toward the posterior end, forming the spinal cord
myelencephalon
continuation of the brain and is located in the trunk region
spinal cord
Short and contained in the neural canal of the vertebral column
spinal cord
label the frog brain (dorsal, ventral, longitudinal section)
grade yourself accordingly
label the frog brain (real photo)
grade yourself accordingly
consist the structures of the nervous system outside the CNS
peripheral nervous syste
Mainly made up of nerves that extend from the brain and the spinal cord
peripheral nervous system
connect the CNS to the receptors and effectors of the body
peripheral nerves
correction of sympathetic trunk to the PNS
ramus communicans
consist of two slender delicate
thread-like nerve cords (i.e. sympathetic trunk)
sympathetic nervous system
run beneath the vertebral column, one on either side of the dorsal aorta
sympathetic trunk
Has a series of 10 sympathetic ganglia
sympathetic trunk
composed of ten pairs in the brain
cranial nerves
arises from the anterior end of the olfactory lobe and innervates the cells of the olfactory sac
olfactory nerve
what type of nerve is I nerve
sensory
nerve fibers arise from the retina of the eye
optic nerve
these fibers generally cross or decussate out of the what
optic chiasma
cranial nerve II is purely
sensory
two optic nerves enter this of the opposite side
optic thalamus
Terminates in the thalamencephalon
optic thalamus
small nerve arising from the ventral side of the midbrain (crura-cerebri)
occulomotor nerve
divides into branches which supply the anterior, superior, and inferior recti muscles and inferior oblique muscle of the eyebal
occulomotor nerve
cranial nerve III is what
exclusively motor
two longitudinal bands of nerve fibers in the contracted region of the brain
crura-cerebri
small nerve arising from the dorsal side of the brain between the optic lobes and cerebellum and going to the superior oblique muscle of the eyeball
trochlear or pathetic nerve
cranial nerve IV is what
motor
largest of the cranial nerves arising from the sides of the anterior end of the medulla oblongata
trigeminal nerve
before the trigeminal nerve emerges from the skull it bears this
gasserian ganglion
cranial nerve V is what
mixed nerve
three branches of trigeminal nerve
ophthalmic superficialis
madibular
maxillary
nerves that passes along the dorsal border of the orbit and goes to the skin of the snout
ophthalmic superficialis
what type of nerve is ophthalmic superficialis
somatic sensory
two branches of the trigeminal nerve that arise from a common stem and separate
mandibular and maxillary
goes to the muscles of the lower jaw
mandibular
what type of nerve is mandibular
visceral motor nerve
what type of nerve is maxillary
somatic sensory
forms two branches going to the skin of the upper jaw and upper lip
maxillary nerve
arises from the ventral side of the medulla oblongata and enters the orbit and goes to the posterior rectus muscle of the eyeball
abducens nerve
what type of nerve is cranial VI
motor nerve
arises from the antero-lateral side of medulla oblongata close behind the fifth
facial nerve
what type of nerve is cranial VII
mixed nerve
Mixed nerve having both visceral sensory and visceral motor fibers
facial nerve
facial nerve is divided into two branches:
palatine
hyomandibular
branch of facial nerve that is going to the roof of the buccal cavity
palatine
branch of the facial nerve that is going to the tongue and muscles of the lower jaw
hyomandibular
somatic sensory arising from the medulla oblongata behind the seventh and goes to internal ear
auditory nerve
mixed nerve arising from the lateral side of medulla and goes to the tongue, hyoid, and pharynx
glossopharyngeal
mixed nerve arising from the lateral side of the medulla and goes as visceral branch to the larynx (laryngeal), esophagus and stomach (gastric), heart (cardiac), and lungs (pulmonary)
vagus or pneumogastric
ten pairs of nerves of the frog arising from the spinal cord
spinal nerves
Arises by a dorsal and ventral root
spinal nerve
dorsal root of the spinal nerves has these
dorsal ganglion
white calcareous body that surrounds the dorsal ganglion
gland of swammerdam
innervates the tongue and hyoid muscles
first spinal nerve
biggest, receives branches from the first spinal nerve
second spinal nerve
innervates the shoulder and forelimbs
third spinal nerve
Sends a branch to the second nerve and branch off to the external oblique, transversus and skin
third spinal nerve
first, second, and third spinal nerve make up this
brachial plexus
are distributed to the muscles and skin of the body wall
fourth, fifth, and sixth spinal nerve
form the sciatic plexus, which innervates the hindlimbs
seven, eight, and ninth spinal nerve
is the sciatic nerve
ninth spinal nerve
innervates the urinary bladder and cloaca
tenth spinal nerve
label the spinal nerve
grade yourself accordingly
this spherical egg is partially pigmented
unfertilized egg
is polar
unfertilized egg
pigmented side which contains very little yolk
animal hemisphere
More cells than its counterpart and is smaller in size
animal hemisphere
is in the anterior side
animal hemisphere
hemisphere that synthesizes melanin
animal hemisphere
unpigmented yolky side
vegetal hemisphere
impedes division so there is a slow division of cells in this side
yolk
has bigger and fewer cells
vegetal hemisphere
hemisphere in the posterior side
vegegtal hemisphere
label the unfertilized egg
grade yourself accordingly
succession of rapid cell division that follows fertilization
cleavage
affected by the type of egg
cleavage
incomplete cleavage
meroblastic
cleavage in birds and fish
meroblastic
complete cleavage
holoblastic
cleavage seen in frogs and mammals
holoblastic
begins when the egg is fertilized by the sperm cell
cleavage stage
appearance of this is a distinct characteristic of the cleavage stage
first cleavage furrow
vertically oriented, produces a 2-celled stage embryo
first cleavage plane
follows the first cleavage plane that is also vertically oriented, which yields a 4-celled stage embryo
second cleavage
is in horizontal place produces 8 cells
third cleavage
in this stage of cleavage, the cells at the animal hemisphere are smaller than the cells at the vegetal hemisphere
third cleavage
smaller units that the cleavage produces
blastomeres
constriction that bisects the cell
cleavage furrow
smaller cells at the animal hemisphere
micromeres
bigger cells a the vegetal hemisphere
macromeres
contain yolk granules
macromeres
ball of cells that is solid
morula
cleavages that are regular
first cleavages
cleavages that become irregular
32-celled stage
the fertilized shifts this much degree toward the point of entry of sperm
30 degrees
formed when the fertilized egg shifts 30 degrees
gray crescent
Establishes the dorsal side
gray crescent
label the late cleavage
grade yourself accordingly
what stage is this accomplishment:
Increase in the number of cells
late cleavage
what stage is this accomplishment:
Establishment of organ-forming zones or presumptive germ layers
late cleavage
formed in cleavage, the space
blastocoel
embryo in cleavage
blastula
as cleavage continues, the blastomeres become arranged around the outside
blastula
Result of subsequent cleavages
blastula
observed consisting of many cells with smaller cells (micromeres) and larger cells (macromeres)
blastula
located at the animal hemisphere
micromeres
located at the vegetal hemisphere
macromeres
so-called this because of the development of the eccentric cavity known as the blastocoel at the animal hemisphere
blastula
central fluid filled cavity forming in the animal hemisphere
blastocoel
smaller cells of the animal hemisphere that form the roof of the blastocoel
micromeres
thin layer of brown pigment in the micromere that is observed at the external surface of the outermost cells
melanin
yolk-laden cells that form the floor of the blastocoel
macromeres
secondary membrane enveloping the embryo
fertilization membrane
makes the gastrula recognizable, a crescentric slit
blastopore
where the cell invaginates and later becomes circular in shape with a yolk plug
blastopore
gastrulation is completed when these are formed
3 germ layers
the cavity that is produced by the infolding of layer of surface cells
archenteron
Also known as the gastrocoel
archenteron
archenteron in future stages is known as the
primitive gut
Becomes the future digestive tract
archenteron
external opening of the archenteron
blastopore