Test
Fluoride
Este test tiene tipos de pregunta que se abren en el reproductor de siempre.
Preguntas del test (22)
1Which of these mechanisms allow fluoride to increase the resistance of teeth to acid attack?
- AReduce/inhibit enamel dissolving
- BPromoting remineralisation
- CChanging plaque ecology
- DReducing plaque acid production
- EIncreased enamel dissolution
2What is the acute lethal dose of fluoride?
- A32-64mg F / kg body weight
- B5 g F / kg body weight
- C32-64g F / kg body weight
- D5 mg F / kg body weight
3What is the toxic dose for fluoride?
- A5 mg F/ kg body weight
- B5 g F/ kg body weight
- C32-64mg F / kg body weight
- D32-64g F / kg body weight
4What are some clinical symptoms of fluoride poisoning?
- ANausea
- BDiarrhoea
- CConvulsions
- DCardiac arrhythmias
- EConjunctivitis
5Why might acute fluoride poisoning lead to cardiac dysrhythymia?
- AHypocalcemia / Hyperkalemia
- BHypercalcemia / Hypokalemia
- CHypernatremia / Hyperkalemia
- DHypercalcemia / Hyponatremia
6Skeletal fluorosis is sometimes mistaken for...
- AArthritis
- BOsteoporosis
- CParkinson's
- DHuntington's
7How does fluoride impair enamel formation?
- AInterferes with the ameloblasts in the early maturation phase leading to imperfect crystals / prisms
- BInterferes with the ameloblasts in the late maturation phase leading to imperfect crystals / prisms
- CLeads to imperfect collagen deposition by the ameloblasts leading to imperfect crystals / prisms
- DLeads to imperfect hydroxyapatite deposition by the odontoblasts leading to imperfect enamel crystals / prisms
8How does fluoride impair dentin formation?
- ALeads to impaired random collagen and hydroxyapatite deposition which is more susceptible to caries
- BLeads to impaired random hydroxyapatite deposition which is more susceptible to caries
- CLeads to impaired random collagen deposition which is more susceptible to caries
9Fluoride _________ mineralisation of bone, leading to heavy irregular mineralisation of bone.
- AStimulates
- BInhibits
1075-90% of fluoride is absorbed in the
- AStomach
- BDuodenum and Upper jejunum
- CLower jejunum and ileum
- DDuodenum only
11Fluoride is mostly absorbed by...
- APassive diffusion
- BActive transport
- CFacilitated diffusion
12Maternal and Foetal blood fluoride levels tend to be..
- ASimilar, therefore related.
- BCompletely different, therefore unrelated.
13The three phases of fluoride transport are:
1. Tissue fluid / soft tissue eq[blank_start]uilibration[blank_end] and dilution
2. Hard tissue deposition in tissues with high F [blank_start]affin.[blank_end]
3. [blank_start]Renal[blank_end] clearance of F which not deposited in skeleton- Auilibration
- Baffinity
- CRenal
14Fluoride accumulates in the soft tissues.
- AVerdadero
- BFalso
15Saliva and Tissue fluid have similar fluoride levels to blood plasma.
- AVerdadero
- BFalso
16Why does fluoride have such a high affinity for bone?
- AIt has a high affinity for hydroxyapatite in bone, preferentially forming fluorapatite.
- BIt has a high affinity for collagen in bone, preferentially forming fluoridated collagen.
- CIt has a high affinity for receptors in bone marrow which allow it to bind readily
17What is the half life of fluoride in someone who is not frequently exposed to F?
- A24 hrs
- B2 years
- C12 hrs
- D1 hr
18What factors might impact on renal clearance of fluoride?
- ADose of fluoride
- BPrevious exposure
- CFluid intake
- DCirrhosis
- EHalf life of fluoride
19Fluoride interferes with acid production by bacteria. How does it inhibit it?
- AInhibits the enolase enzyme involved in glycolysis (which ultimately produces lactic acid)
- BInhibits the alpha-ketoglutarate enzyme involved in glycolysis (which ultimately produces lactic acid)
- CInhibits the hexokinase enzyme involved in glycolysis (which ultimately produces lactic acid)
20Fluoride interferes with extracellular polysaccharide formation
- AVerdadero
- BFalso
21Fluoride decreases bacterial intracellular polysaccharide formation and glucose uptake.
- AVerdadero
- BFalso
22Fluoride does not affect cariogenicity but does decrease the amount of plaque formation.
- AVerdadero
- BFalso
Información
- Descripción
- .
- Autor
- 0 9
- Idioma
- English
- Visitas
- 62
- Etiquetas
- Valoración
- Aún sin valoraciones Valora este test