Unit 2 Practice Quiz Flashcards
Which of the following is the prenatal diagnostic procedure that samples amniotic fluid?
Amniocentesis
A blastocyst is a structure formed during prenatal development consisting of _____ cells and an inner mass of cells that finally develop into the embryo.
Trophoblast
Congenital malformations are birth defects or developmental problems that are evident
at birth.
An ectopic pregnancy has implantation directly occurring
outside the uterus.
Which of the following structures is directly derived from the implanted blastocyst?
Embryo
Which of the following is the CORRECT definition of histodifferentiation?
Development of specific tissue morphology
Which of the following is the posterior part of the future digestive tract?
Hindgut
The hypoblast layer is also considered part of which of the following structures?
Inferior layer of the bilaminar disc
Where is the primitive streak located within the embryonic disc?
Middle
Which of the following is the BEST term used for the embryonic layer located between the ectoderm and the endoderm?
Mesoderm
Which of the following can be considered the process of reproductive cell production that ensures the CORRECT number of chromosomes?
Meiosis
Which of the following is a viral infection that can serve as a teratogen and thus is transmitted by way of placenta from the pregnant woman to possibly cause injury to embryo?
Rubella
Somites are paired cuboidal aggregates of cells directly differentiated from the
mesoderm.
Which of the following is the BEST term used for a fertilized egg formed from the union of ovum and sperm?
Zygote
What type of stain is tetracycline stain considered?
Intrinsic
The pharyngeal or branchial apparatus includes the pharyngeal or branchial arches, the pharyngeal or branchial grooves and membranes, as well as the
pharyngeal pouches.
The intermaxillary segment is a direct growth from which of the following paired processes on the inside of the stomodeum?
Medial nasal
Which of the following initially primitive structures in the embryo is formed from the stomodeum?
Mouth
Which numbered pharyngeal or branchial arch is the hyoid arch since it is located inferior to mandibular arch in the embryo?
Second
Cervical cysts are developed when which of the following structures do NOT become obliterated upon maturation of the fetus?
Branchial or pharyngeal grooves
Which of the following structure’s formation allows for the disappearance of Meckel cartilage?
Mandible
Reichert cartilage is the cartilage within the second pharyngeal or branchial arch that eventually disappears, although parts of it form
a middle ear bone.
Which of the following is considered a rudimentary embryonic pharyngeal or branchial arch?
Fifth
Which pharyngeal or branchial arch in the embryo fuses with the fourth pharyngeal or branchial arch?
Sixth
Where are the pharyngeal pouches located during development of the face and neck?
Between the pharyngeal or branchial arches
How many pharyngeal pouches are present during development of the face and neck?
Four
What is the largest number of pairs of pharyngeal or branchial arches that can be present during development of the face and neck?
Six
Which of the following is considered the first pharyngeal or branchial arch?
Mandibular arch
Which pharyngeal or branchial arch is responsible for parts of the future hyoid bone?
Third
Where is the frontonasal process located during development of the face?
Cephalic end of the embryo
Where is the tuberculum impar located in the embryo during development of the face and neck?
Midline
From which pharyngeal or branchial arch during development of the face and neck does the epiglottic swelling develop?
Fourth
The copula is formed from the third and fourth pharyngeal or branchial arches that later overgrows the _____ arches to form tongue base.
second
The copula is formed from the third and fourth pharyngeal or branchial arches that later overgrows the _____ arches to form tongue base.
second
Which of the following forms the base of the tongue during development?
Tuberculum impar
Which of the following cell types is known to directly influence the ectomesenchyme?
Neural crest cells
