topic 2 Flashcards
1
Q
list 4 clinical applications of radioisotopes?
A
- disease diagnosis / imaging
- disease treatment
- assessment of degree of disease severity
- treatment monitoring
2
Q
what isotope of iodine treats thyroid cancer?
A
I 131
3
Q
how does a PET scan work (positron emission technology)?
A
- produces a 3D image of functional processes in the body
- detects gamma rays emitted by a radioisotope (tracer) introduced into the body as part of a biologically active molecule
4
Q
A
5
Q
what are the 4 properties of water that contribute to Earth’s fitness for life?
A
- cohesion / adhesion
- temperature moderation
- evaporative cooling
- versatility (as a solvent)
6
Q
what is cohesion?
A
the bonding of water molecules to neighboring molecules (due to hydrogen bonding)
7
Q
how does water moderate air temperature?
A
- by absorbing heat from air that is warmer
- by releasing the stored heat to air that is cooler
8
Q
what is a solution?
A
a homogeneous mixture of substances
9
Q
what is an aqueous solution?
A
a solution in which water is the solvent
10
Q
A
