Dental Sciences: Test 4 Flashcards
What are the 4 basic tissues?
epithelium, connective tissue, muscle, nervous
What is the Cell membrane?
the wall that keeps cellular fluid in and unnecessary foreign materials out
Cytoplasm
area inside cell membrane is a fluid medium
Mitochondria
responsible for energy production and for the rate at which the cell uses energy
Endoplasmic Reticulum
responsible fore the manufacture of various products to be used inside or outside the cell
Golgi apparatus
thin membrane to surround the material produced by the endoplasmic reticulum so it can be moved around
How many layers are in simple epithelium?
Single-layer
How many layers are in stratified epithelium?
Double-layer
What is Simple cuboidal or simple columnar epithelium?
lines digestive tract, found in ducts of various glands (kidney, salivary glands, pancreas, and others
Pseudostratified columnar epithelium
“falsely layered epithelium” contains cilia (small hairlike projections
What is the most common type of epithelium?
Stratified squamous
This makes up the mucosa of the oral cavity
Stratified squamous
Exocrine glands
carry away by ducts leading from glands
Endocrine glands
ducts are lost after the gland develops and whose products are carried away from gland in the bloodstream
Salivary glands produce what 3 types of secretions?
Serous, Mucous, Seromucous
Serous secretion
thin watery substance containing most of digestive enzymes found in saliva
Mucous secretion
thicker more viscous substance
Seromucous secretion
produced by many of the glands that have both serous and mucous
Fibroblast
cell that sprouts for forms fibers (collagen fibers)
this attaches the tooth to its socket
Collagen fibers
Special connective tissue
Cartilage, Bone, Blood
What is fibrocartilage and where is it found?
cushioning substance found in TMJ
What is the composition of Bone Structure?
50% hydroxyapatite crystals with the rest collagen, ground substance, and water
What is Sickle Cell Anemia?
RBC’s are c-shaped rather than round and lack sufficient hemoglobin
What are the 2 groups of WBC’s?
Granulocytes and Agranulocytes
The primitive oral depression is know as?
Stomedeum
If the migration of the connective tissue of the upper lip fails, it will result in a separation between medial nasal process and maxillary process known as?
cleft lip
Cleft lip takes place by about the ___ embryonic week
6th
If a cleft palate is going to develop, it will begin between the ___ and the ____ week
7th and 11th
Two most common types of cleft lip are:
Unilateral and Bilateral clefts
First signs of tooth development is seen when?
6th embryonic week
continued thickening of dental lamina in 10 areas of upper arch and 10 areas of lower arch at about the ____ embryonic week?
8th
The initial budding from the dental lamina at the 10 thickened areas in each arch is referred to as:
Bud stage
This is the hardest structure of the body:
Enamel
What are the %s of enamel?
96% inorganic in composition- hydroxyapatite
4% composed of water and fibrous in organic material
This is made up of hydroxyapatite crystals and is primary unit pf enamels structure:
Enamel rod
The final job of ameloblast is to lay down a protective layer over the enamel, called the:
Primary enamel cuticle or Nasmyth’s Membrane
When the tooth erupts into the oral cavity, the dentin that has formed by that time is known as
Primary Dentin
