Review questions week 4

The form of proliferation that happens due to tissue enlargement by addition of layers to the outside of the structure.

Appositional growth

tooth abnormality due to disturbances in the cap stage that results in the look of two teeth in one but has ONE PULP CHAMBER

Dens in Dente

Condensed mass of ectomesenchyme within the concavity of the enamel organ that is the future dentin and pulp.

Dental papilla

The outer cells of the dental papilla will eventually turn into:

Dentin

Induction is the initial physiological stage within the embryonic period and only happens in this stage of development.

False

Medical providers know of all teratogens and therefore, none are prescribed to pregnant women.

False

Physiological stage where one group of cells acts on another. Cause and effect

Induction

Placenta develops due to:

Interaction of Trophoblasts and Endometrial tissue

Development of specific tissue structure or differing form due to migrating cells and activity.

Morphogenesis

Name of cells that migrate and differentiate into structures of the head and neck.

Neural crest cells

Treacher collins syndrome is a birth defect that happens due to the failure of what type of cells to migrate.

Neural crest cells

What is responsible for out bilateral symmetry

Primitive streak

The earliest indication of the tissue type or organ during the prenatal development.

Primordium

Primary physiological stage involved in the Bud Stage of tooth development

Proliferation

Which of the following could be considered teratogenic

environmental agents infection drugs, controlled and non-controlled substances

The foregut represents the mature pharynx and digestive tract

false

Which is the name for the Embryonic event that is described by the fertilized ovum implanting itself into the uterus wall.

implantation

what layer of the trilaminar disc leads to connective tissue ( dermis, bone, cartilage, blood)

mesoderm

missing teeth is due to a lack of initiation and a lack of formation of the dental lamina

true

Provides nourishment for the embryonic disc until the placenta is working efficiently.

yolk sac