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32 Cards in this Set

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What are the major basic components of the digestive system?
Alimentary canal and associated glands
Name some functions of the digestive system.
Prehension, ingestion
Mastication
Deglutition
Digestion
Absorption of nutrients
Elimination of undigestible/undigested food products
What are some of the associated digestive glands?
liver, gall bladder, pancreas, salivary glands
What is the rostral opening to the alimentary canal known as?
Oral cavity
What are some structures in the oral cavity?
Buccal cavity
Lips
Cheeks
Hard palate
Soft palate
Tongue
Gingiva
Teeth
What type of epithelium is found in the oral cavity?
Stratified squamous epithelium (nonkeratinized to heavily keratinized)
What are the types of oral mucosa?
Masticatory mucosa
Lining mucosa
Specialized mucosa
T or F:
Ruminants, horses, and pigs have cornified lips.
False!
Pigs (and carnivores) don't have cornified lips.
What kinds of glands are found in the buccal cavity?
Serous, mucous, and mixed.
What microscopic structures do ruminants have on their lips to help with prehension and mastication?
Oral papillae
Identify A and B
What is the epithelium on the dorsal and ventral side of each structure?
A - Hard palate - dorsal has respiratory epithelium; cornified stratified squamous epi on ventral
B - Soft palate - ciliated pseudostratefied columnar epi on dorsal; cutaneous mucous membrane on ventral
Identify these papillae! Which are mechanical and which contain taste buds?
A - Circumvallate - taste
B - Conical (or lenticular) - mechanical
C - Foliate - taste
D - Filiform - mechanical
E - Fungiform - taste
Describe the locations of taste buds on fungiform, foliate, and circumvallate papillae.
Taste buds are on the apex for fungiform and on the sides for the other two.
What are the cell types in a taste bud and what is the function of each?
Sustentacular (support)
Gustatory (taste receptor)
Basal (regeneration)
T or F:
A gustatory cell in a taste bud is a modified bipolar neuron.
False you punk!
nerve endings synapse on the gustatory cells!
What is the hardest substance in the body and what is it made of?
Enamel
95 - 99% hydroxyapatite
Identifizzle da shiz on dis toof, y'all!
A - Crown
B - Root
C - Enamel
D - Dentin
E - Pulp
What part of the tooth provides vascularization and innervation?
The pulp cavity
What is dentin made of?
69% hydroxyapatite
Identify the parts of this developing tooth.
A - Ameloblasts
B - Forming enamel
C - Forming dentin
D - Odontoblasts
E - Forming pulp cavity
T or F:
Brachydont ameloblasts disintegrate upon eruption. Therefore dentin is incapable of repair.
FALSE! READ THE QUESTION NEXT TIME, JERKY!
Ameloblasts do disintegrate upon eruption but they make ENAMEL not DENTIN!!! Odontoblasts make dentin!
T or F:
Ameloblasts and odontoblasts are big fans of Marissa Tomei.
WTF?
These cells do have Tome's processes through which they secrete enamel or dentin
What lines dentin below the level of the gingival?
Cementum
What attaches the tooth to the alveolar bone?
Periodontal ligament
What cells are involved in the formation of cementum?
Cementoblasts
Identify these parts of a tooth
A - Crown
B - Gingiva
C - Alveolar bone
D - Periodontal ligament
E - Gingival sulcus
What are the two main types of mammalian teeth?
Brachydont
Hypsodont
T or F:
Hypsodont teeth have enamel covered by cementum while brachydont teeth don't.
True!
Brachydont teeth have a definite cementum/enamel junction while hypsodont teeth have cementum laid on top of enamel
T or F
The main differences between brachydont and hypsodont teeth involve growth rate and mineralization layers
True!
Hypsodont teeth grow for much of the adult life while brachydont teeth do not grow after eruption completion.
Brachydont teeth have a cementum/enamel junction while hypsodont teeth have cementum on top of enamel
T or F
Hypsodont teeth never form true crowns.
True!
What are the invaginations of cementum and enamel on the surface of hypsodont teeth?
Infundibula
What is the most entertaining part of a hypsodont tooth?
The inFUNdibulum! hahahahahahahahahahahahaha