CNA & BASIC PATIENT CARE EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Two systems of measurement - CORRECT ANSWER -Traditional(British)
System international (SI)
Exposure units
What are they?
What are the units called? - CORRECT ANSWER -It's the intensity of the radiation in the air
Coulomb/kilogram
Roentgen
Dose units
What are they?
What are they called? - CORRECT ANSWER -They are absorbed in patient tissue
Gray
Rad
Equivalent dose units
What are they?
What are they called? - CORRECT ANSWER -They are the occupational dose measures
absorbed in the tissue
Sievert
Rem
Weighting factor - CORRECT ANSWER -used to convert absorbed dose to equivalent dose
Lowest to highest weight factors - CORRECT ANSWER -X-ray/gamma ray: 1
Protons: 2
Neutrons: 5
Alpha particles: 20
Sensitivity of a cells depends on 4 factors - CORRECT ANSWER -Age
, Differentiation
Metabolic rate
Mitotic rate
Sensitivity of cells for age - CORRECT ANSWER -Younger cell are more sensitive
Sensitivity of cells for differentiation - CORRECT ANSWER -Non-specialized cells are more
sensitive than complex ones
Sensitivity of cells for metabolic rate - CORRECT ANSWER -Cells that use energy rapidly are
more sensitive than ones with slower metabolism
Sensitivity of cells for mitotic rate - CORRECT ANSWER -Cells that divide and multiply rapidly
are more sensitive than those that replicate slowly
Somatic effects of radiation - CORRECT ANSWER -Damage to the body directly
Further classified into short or long term effects
Genetic effects of radiation - CORRECT ANSWER -Damage to the reproductive cells
Short term effects of radiation - CORRECT ANSWER -seen minutes, days or months after
exposure.
-within 3 months
Associated with high doses
They are deterministic
-predictable at a known dose
-dose dependent
Directly proportional to the amount of exposure.
LD50/30 - CORRECT ANSWER -lethal dose to kill 50% of a population in 30 days
Short term effects are associated with - CORRECT ANSWER -High doses of radiation
Similar to a sunburn
Long term effects of radiation - CORRECT ANSWER -May not appear for up to 30 years
-cancer
-cataractogenesis
Referred to as latent effects
Genetic effects occur as a result of reproductive cell damage. May occur as defects.
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Two systems of measurement - CORRECT ANSWER -Traditional(British)
System international (SI)
Exposure units
What are they?
What are the units called? - CORRECT ANSWER -It's the intensity of the radiation in the air
Coulomb/kilogram
Roentgen
Dose units
What are they?
What are they called? - CORRECT ANSWER -They are absorbed in patient tissue
Gray
Rad
Equivalent dose units
What are they?
What are they called? - CORRECT ANSWER -They are the occupational dose measures
absorbed in the tissue
Sievert
Rem
Weighting factor - CORRECT ANSWER -used to convert absorbed dose to equivalent dose
Lowest to highest weight factors - CORRECT ANSWER -X-ray/gamma ray: 1
Protons: 2
Neutrons: 5
Alpha particles: 20
Sensitivity of a cells depends on 4 factors - CORRECT ANSWER -Age
, Differentiation
Metabolic rate
Mitotic rate
Sensitivity of cells for age - CORRECT ANSWER -Younger cell are more sensitive
Sensitivity of cells for differentiation - CORRECT ANSWER -Non-specialized cells are more
sensitive than complex ones
Sensitivity of cells for metabolic rate - CORRECT ANSWER -Cells that use energy rapidly are
more sensitive than ones with slower metabolism
Sensitivity of cells for mitotic rate - CORRECT ANSWER -Cells that divide and multiply rapidly
are more sensitive than those that replicate slowly
Somatic effects of radiation - CORRECT ANSWER -Damage to the body directly
Further classified into short or long term effects
Genetic effects of radiation - CORRECT ANSWER -Damage to the reproductive cells
Short term effects of radiation - CORRECT ANSWER -seen minutes, days or months after
exposure.
-within 3 months
Associated with high doses
They are deterministic
-predictable at a known dose
-dose dependent
Directly proportional to the amount of exposure.
LD50/30 - CORRECT ANSWER -lethal dose to kill 50% of a population in 30 days
Short term effects are associated with - CORRECT ANSWER -High doses of radiation
Similar to a sunburn
Long term effects of radiation - CORRECT ANSWER -May not appear for up to 30 years
-cancer
-cataractogenesis
Referred to as latent effects
Genetic effects occur as a result of reproductive cell damage. May occur as defects.
