Quiz on 2.1 & 2.4 Flashcards
Quiz on h/o 2.1 & 2.4 Monday 9/30
when gametes combine they form a
zygote
cell division that makes different types of cells from another cell is called
differentation
the hallow ball of cells form the zygote is the
blastula
a human 10 weeks of age from conception is
an embryo
the embryo will attach and gain nourishment through fingerlike projections into the uterus. this area will develop into the _______ and _______ of the fetus
chorion
amnion
the embryo differentiates into three primary ______ layers
germ
the future organs and systems built from the three germ lyers are its
derivitives
the _________ is the first derivative of the ectoderm on the outer body of the embryo
epidermis
ectoderm that has been folded in from the surface and sunk below the surface as a tube from head to tail is called the
neural tube
the combination of sperm and egg cells to form a zygote is called ___________ and it usually occurs in the fallopian tube
fertilization
_________ is the embedding of the developing embryo into the maternal uterine wall
implantation
T/F
the embryo is the group of cells that will differentiate into a human being
true
the blastula contains cells that differentiate into the embryo and the _______ and fluid
supporting tissue placenta
T/F
following development of the embryo, we begin with a flat plate of cells that fold up into a tube that then folds over as a C-shaped organism
true
at first, nourishment for the embryo comes from a temporary fluid-filled sac called the ______ sac
yolk
the three embryonic germ layers are
mesoderm
ectoderm
endoderm
ectoderm folding in along the length of the embryo is called the ________ groove and it becomes the ________ tube
neural
neural
neural tube derives the ________ and ________ of the central nervous system
brain
spinal cord
pairs of neural crest cells coming off the spinal cord will become the ________ nerves
spinal nerves
T/F
the only place in the embryo where ectoderm will turn into mesoderm is in the tail
false
the __________system consisting of the brain, spinal cord, and all the nerves derives from ectoderm
nervous
the _______ and _________ systems develop from the endodermial tube
respiratory
digestive
cells that bud off of the neural tube in pairs are called
neural crest cells
pairs of neural crest cells coming off the brain area will become
cranial nerves
facial mesoderm
the beginning portion of the developing endoderm tube is the ____ which is a wide area that forms paired pouches
pharynx
the endoderm tube bulges out and bends just beyond the esophagus to form the
stomach
paired bumps of mesoderm form along the sides of the neural tube and are called
somites
which is not a division of the somite
dermis
t/f
the circulatory system derives from paired tubes of endoderm
false
paired bumps growing along either side of the embroyo’s head and neck region are called the pharyngeal
arches
the outside of an arch is covered with ____; the pouch is made of______
ectoderm
endoderm
t/f
grooves I and IV eventually disappear
false
which does not derive from pouch I?
external auditory meatus
what derives the palatine tonsils?
pouch II
the anterior two thirds of the tongue is called the
body
t/f
the lateral lingual processes coalesce with the tuberculum impar to form the posterior tongue
false
the v-shaped row of bumps on the tongue are the _____, and they mark be border between anterior and posterior tongue
circumvallate papillae
which pharyngeal arch divides into the maxillary and mandibular processes
I
which process does not come from the frontal process?
maxillary process
t/f
the globular process becomes the philtrum and the primary palate
true
two systems that give structure and movement to the body are the ______ and _______ systems, they derive from mesoderm
muscle
skeletal
the tissue that is “left over” from development with no particular funtion in the adult is called
remnant
the area of the embryo that will become the future mouth is called the _____. It is covered for a short time by the ______ membrane
stomodem
buccopharyngeal
the cartilage of arch I is called ______ cartilage
meckels
the ossicles come from the cartilage of arch I (Meckel’s) and arch II, also known as _____ cartilage
reichets
how many processes come together to form the tongue
6
the remnant of the developing thyroid gland left on the surface of the tongue is called
foramen cecum
the facial process that becomes the forehead is called the ______ process
frontonasal
which processes coalesce to become the hard palate
primary palate
do the two maxillary processes ever come together?
yes
if facial processes do not come together properly, a _____ lip or palate may result
cleft
the temporary “jawbone” in the mandibular arch is known as
meckel’s cartilage
Germ layer that derives digestive system
endoderm
Germ layer that derives thyroid gland
endoderm
Germ layer that derives epidermis
ectoderm
Germ layer that derives bones
mesoderm
Germ layer that derives brain
ectoderm
Germ layer that derives muscle
mesoderm
Germ layer that derives respiratory system
endoderm
Germ layer that derives lining of anterior two thirds of tongue
ectoderm
Arch/pouch/groove? eustachian tube
pouch I
Arch/pouch/groove? parathyroid glands
pouches III and IV
Arch/pouch/groove? Meckel’s cartilage
arch I
Arch/pouch/groove? palatine tonsils
pouch II
Arch/pouch/groove? Eardrum
groove I and pouch I
Arch/pouch/groove? External meatus
groove I
What becomes cheeks
maxillary
What becomes forehead
frontal
What becomes mandible
mandibular
What becomes side of nose
lateral nasal
What becomes philtrum
median nasal/globular
What becomes sides of palate
maxillary
What becomes front of palate
globular
