Term
Name the 3 types of doseresponse relationships. 

Definition
1. Sigmoid (AKA nonlinear) 2. DirectLinear 3. Linear Quadratic 


Term
For which type of doseresponse relationship is there a threshold dose? 

Definition


Term
All nonstochastic effects have which type of doseresponse relationship? 

Definition


Term
Erythema and cataracts have which type of doseresponse relationship? 

Definition


Term
Why do all 3 types of doseresponse relationship graphs for any type of effect start slightly above zero? 

Definition
Because the endemic (naturallyoccuring) level is the starting point  in other words, in a given group even with no dose (0 on dose axis), there will still be people with that effect who are part of the naturallyoccurring percentage. 


Term
Of the 3 types of DRR, which is the worst type and why? 

Definition
DirectLinear relationship, because there is no safe threshold  any radiation at all increases the chance of the effect and it is linear  as the dose goes up, the chance goes up directly (it goes up less steeply with LinearQuadratic) 


Term
Of the three types of DRR, which is the best type and why? 

Definition
Sigmoid (or nonlinear), because there is a safe threshold  at low levels, the effect doesn't show up. The other two have no safe threshold, although LQ is a little safer than LD. 


Term
What shape does the sigmoid DRR graph have? 

Definition
An "S"  stays at 0 for low doses (the bottom of the "S", then slants up after the threshold is reached until it hits the dose where 100% show the effect, then goes horizontal again (the top of the "S) 


Term
Stochastic effects all have *** or *** DRRs? 

Definition
LinearDirect or LinearQuadratic 


Term
The effect of genetic mutations in reproductive cells has what type of DRR? 

Definition


Term
When an effect has a LinearQuadratic DRR, at low doses the effect has a/an *** relationship with dose, while at high doses, it has a/an *** relationship with dose. (linear/exponential) 

Definition
At low doses, linear. At high doses, exponential. 


Term
Most (but not all) radiationinduced cancers have which type of DRR? 

Definition

