division of a cell into two daughter cells occurs during which phase of mitosis
prophase
anaphase
metaphase
telephase
telephase
each of the following is a period of prenatal development EXCEPT one which one is the EXCEPTION
fetal
ovulation
embryonic
preimplantation
ovulation
down syndrome is a developmental distrubance that occurs during which period of prenatal development
fetal
embryonic
preimplantation
preimplantation
which period of prenatal development occurs during months 3 to 9
fetal
embyroinc
preimplantation
a only
both a and b
fetal
match each germ layer listed to the stucture it forms in the developing embryo
endoderm
mesoderm
ectoderm
gastrointstinal tract, epithelium and associated glands
muscles bone cartilage blood dentin pulp cementum and periodontal ligament
nervous system, epidermis sensory epithelium of the eye ear and nose tooth enamel and oral epithelium
the earliest indication of a part or an organ during prenatal development is referred to as the
primordium
stomodeum
zygote
nuculeus
primordium
during facial development the two structures forming the major facial structures are the frontonasal proces and the pharyngeal (branchial)arch 1. this process begins during week 6 in utero
true statements or false
the first statement is true and the second statement is false
from the following list select the structures of the embryo that begin development in week 4 of the prenatal development
face
neck
palate
tongue
placenta
face neck tongue
the first branchial arch is also called the mandibular arch. the cartilage forming within the mandibular arch is known as reichert cartlidge
true of false statements
the first statement is true. and the second statement is false
the face and its related tissues begin to form during week 6 of prenatal development within the fetal period. facial development is completed by week 12
true of false statements
the first statement is false and the second statement is true
for each of the developing branchial arches listed select the most appropriate anatomic structure that it gives rise to
mandibular arch (branchial arch 1)
hyoid arch (branchial arch II)
branchial arch III
branchial arch IV
mandible muscles of mastication cranial nerve V
muscle of facial expression cranial nerve VII
tongue cranial nerve X
muscles of throat inferior hyoid cartilage cranial nerve X