Evals 4 : Embryonic Period Flashcards
The condition wherein the calvarium fails to develop
A. Anencephaly
B. Meningomyelocele
C. Meningocele
D. Meningoencephalocele
A. Anencephaly
One of the following is a derivative of mesoderm
A. Spinal cord
B. Enamel of the teeth
C. Scapula
D. Skin
C. Scapula
Spinal cord, enamel of teeth and skin are all from the ECTODERM
The process which involves stimulation of a responding tissue or group of cells by an inducing tissue is called
A. Neurulation
B. Induction
C. Transformation
D. Gastrulation
B. Induction
One of the following is an ectodermal derivative
A. Humerus
B. Brachial plexus
C. Femoral artery
D. Smooth muscle
B. Brachial plexus - ectoderm (peripheral nervous system)
A. Humerus - mesoderm (bone)
C. Femoral artery - mesoderm (blood vessel)
D. Smooth muscle - mesoderm
This structure gives rise to ganglia of cranial nerves, meninges and
glial cells
A. Neural plate
B. Neural folds
C. Neural groove
D. Neural crest
D. Neural crest
One of the following is an endodermal derivative
A. Atrium
B. Epithelial lining of the urethra
C. Kidneys
D. Nails
B. Epithelial lining of the urethra - ENDODERM
A. Atrium - mesoderm
C. Kidneys - mesoderm (excretory system)
D. Nails - ectoderm
Blood cells develop from
A. Visceral mesoderm
B. Intermediate mesoderm
C. Parietal mesoderm
D. Paraxial mesoderm
A. Visceral mesoderm
Visceral mesoderm of wall of yolk
sac - differentiate into blood cells
and blood vessels
The cartilage and bone component of each somite is called
A. Dermatome
B. Myotome
C. Dermomyotome
D. Sclerotome
D. Sclerotome
A. Dermatome - segmental skin component
B. Myotome - segmental muscle component
C. Dermomyotome
Early in the embryonic period the neural folds approach each other
and fuse at
A. Level of first somite
B. Level of cranial neuropore
C. Level of caudal neuropore
D. Level of the future neck
D. Level of the future neck
During the embryonic period
A. The main organ systems are established
B. The embryo is slipper shaped
C. The main organ systems are fully developed
D. The embryo is resistant to teratogens
A. The main organ systems are established
The urinary system develops from intermediate mesoderm.
A. True
B. False
TRUE
All supporting structures of the body develop from the head and tail folds of the embryo.
A. False
B. True
TRUE
The major features of the external body form can be recognized by the end of the second week of development.
A. True
B. False
FALSE
The embryonic period is also known as the period of organogenesis.
A. True
B. False
TRUE
The otic placodes are openings in the cranial end of the neural tube.
A. True
B. False
FALSE
