cellular biology-why do we need to know this?. bushong
TRANSCRIPT
Cellular biology-Why do we need to know this?
Bushong
When an atom is ionized
Chemical binding properties changein large molecules: breakage or
relocation of molecules…become abnormal
Abnormal meansFunction improperlycease to function -impairment or
death of cell
Damage is Reversible
Ionized atoms become neutral…How?
Molecules are mended by repair enzymes
Immediate response to radiationLatent response(Bushong) see Box 32-1
RADIATION INTERACTS AT ATOMIC LEVEL
Atoms combine to form moleculesThe body is made of macromoleculesWhat is the definition of
macromolecules?
With this kind of potential damage….
The government tends to get involvedCHAPTER 9 SHERER
YOU ARE RESPONSIBLE FOR DIFFERENTIATING BETWEEN
ICRPNCRPUNSCEARNAS/NRC-BEIRNRCEPAFDAOSHA
What is the smallest element of protoplasm?
The cell
Which of the following macromolecules contain enzymes for repair?
A) protein b) lipidsc) carbs d) nucleic acids
MORE QUESTIONS
_____provides most of the cell’s energy
DNA and RNA are two types of these
What is function of lipids
Carbohydrates
Nucleic acids
store energy component of membrane protects against cold and
heat assists in digestive process components of substances
such as hormones
Tissues are groups of ?
Organs are groups of ?
System is a group of?
An organism is?
Cells
tissues
organsa human
CELLULAR ANATOMY
RibosomesMitochondriaEndoplasmic ReticulumLysosomesGolgi Apparatus
RADIATION BIOLOGY
CHAPTER 6..an introduction-What do you already know?
DO YOU REMEMBER BERGONIE AND TRIBONDEAU?
Pg 102 (Sherer)
TWO TYPES OF CELLS
Somatic
Germ
MALIGNANT CELLS
Divide abnormallyincreased amount of chromatinincreased amount of nuclear
materialnormal cells stay together (tissue)some malignant cells break away to
other tissues
Direct effect
Where do you think the radiation hits to be given this name?
INDIRECT EFFECT
What molecule to you think radiation hits?
Most interactions occur hereForms free radicals which are
chemical components that damage cells
Free radicals are a result of radiolysis of water
FRACTIONATION
Dividing a dose of radiation into small amounts over a given time
PROTRACTED DOSE
Dose delivered continuously but at a lower rate