-name the medical imagery that penetrates tissues to darken photographic film beneath the body.
-injects or swallows radiopaque substance. fills hallow structures, blood vessels, and intestinal tracts.
-Dense tissue appears white
name the medical imagery that uses low-intensity x-rays and computer analysis.
-slice-type images, and increases sharpness of image.
Computed tomography or CAT scan
name the medical imagery that assesses metabolic state of tissues, distinguishes tissues most active at a given moment.
-inject radioactively labeled glucose.
-image color shows tissues using the most glucose at that moment, and damaged tissues appear dark.
Positron emission tomography (PET scan)
◦Second oldest and second most widely used
◦MechanicsHigh-frequency soundwavesecho back from internal organs
what is the major component that makes up the plasma membrane and nuclear membrane?
what do lysosomes do?
intracellular digestion, autophagy (digests of worn organelles), autolysis (programmed cell death), breakdown glycogen to release glucose.
glucose is released from the ___, and insulin is released from the ___
what do peroxisomes do
detoxify the body of drugs, neutralize free radicals.
What does Rough ER do?
-synthesizes and packages proteins and phospholipids (continuous w/NE).
1) define homeostasis
2) what 2 systems control homeostasis
1) dynamic balance between intracellular and extracellular environments
2) nervous and endocrine system
examples of positive & neg feedback.
Pos=child birth, blood clotting.
Neg=glucose levels, body temp
6 most common elements in human body
C, H, O, N, Ca, P=phosphorus
1) chemical bond names: when 2+ atoms share or loose/gain an electron
2) positively and negatively charged ions
1) covalent & ionic bond respectively.
2) cation, anion
which bonds are strongest & weakest
ionic & H bonds
1) ____ release H, ____ accept H.
2) as H increases ____ decreases. as H decreases ____ increases
3) what's lactiv acid converted to