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RADT 1200 Chapter 7 Test Questions and Answers All Correct $11.49   Add to cart

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RADT 1200 Chapter 7 Test Questions and Answers All Correct

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RADT 1200 Chapter 7 Test Questions and Answers All Correct What does molecular damage results from? - Answer-the formation of structurally changed molecules that cause injury cellular function The entire body process can be affected if a large amount of what is damaged? - Answer-somatic ce...

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RADT 1200 Chapter 7 Test Questions
and Answers All Correct

What does molecular damage results from? - Answer-the formation of structurally
changed molecules that cause injury cellular function

The entire body process can be affected if a large amount of what is damaged? -
Answer-somatic cells

If germ cells are damaged, what can happen? - Answer-future generations can be
affected leading to mutations

What are the 2 classifications of ionizing radiation interaction? - Answer-indirect action
direct action

Where does direct typically happen? - Answer-in DNA

Where does indirect typically happen? - Answer-in water

How much of the human body is water? DNA? - Answer-80%
1%

Because of this, all effects of low-LET irradiation result from.... - Answer-indirect action

What happens in radiolysis of water? - Answer-ionization of water molecules
production of free radicals
production of undesirable chemical reactions and damage
production of cell-damaging substances
organic free radical formation

What are the 2 types of strand break? - Answer-single strand break
double strand break

What happens in a single strand break? - Answer-Ionizing radiation interacts with a
DNA macromolecule
transfers energy
chemical bond is ruptured
a sugar-phosphate rail is potentially damaged

What are sometimes able to reverse this damage? - Answer-repair enzymes

, What happens in double-strand break? - Answer-When there is more exposure of the
DNA macromolecule, additional breaks in the chain occur

Can the breaks be repaired? - Answer-yes but not as easily as with single strand breaks

What happens if the repair does not take place? - Answer-further separation may occur
which eventually threatens cells life

When does a double strand break more likely occur? - Answer-with densely ionizing
radiation (high LET)

What happens if a double strand break happens in the same rung of DNA? - Answer-
cleaved/broken chromosome results
each portion now contains an unequal amount of genetic information

What happens if those unequal, damaged chromosomes divide any further? - Answer-
the daughter cells result in incorrect genetic information which can cause death or
impaired function

What is a mutation? - Answer-when ionizing radiation reacts with DNA to cause a loss
or change in the nitrogenous base

Can this be reversible? - Answer-not normally

What happens if the cell does NOT die? - Answer-incorrect information will be passed
onto the daughter cell

What is radiation biology? - Answer-Branch of biology concerned with the effects of
ionizing radiation on living systems

What are the 3 things radiation biology includes? - Answer-1) injury to the system that
might be produced
2) sequence of events after the effects of ionizing radiation
3) what the living system does to make up for consequences of that energy

How does ionizing radiation damage living systems? - Answer-ionizing the atoms and
compromising the molecular structure

types of radiation that cause damage - Answer-xrays
gamma rays
alpha particles
beta particles
protons

Ionized atoms will now..... - Answer-bond in molecules

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