PS: ran out of time. spent too long on one passage (and still got most questions of that passage wrong) :(
BS: had about 20 minutes of time left over.
V: internet malfunctioned. finished separately.
for V-- relied on memory for detailed questions; inference questions.
answered some questions incorrectly bc did not refer back to passage for specific terms (PS #32)
rushed through questions bc felt time was going to run out
decreased capacity to think clearly due to time stress
--------------------------------------
protein broken down by enterokinase, aminopepitdase, and dipeptidase.
amino acids absorbed into epithelial cells via active transport --> enter bloodstream via villi
if used --> new proteins;
if not used --> catabolized into NH3 (IN INDIVIDUAL CELLS!) --> urea cycle
higher metabolic rate --> curve shifts right (O2 less saturated at given partial pressure)
e.g. mouse vs. elephant (mouse's curve will be right shifted)
helper T -->activate T and B
cytotoxic T --> kills antigens
suppressor T --> downregulates B and T activity
memory T --> proliferate cytotoxic T upon 2nd exposure
*memory B (NOT T) --> recognizes antigens upon secondary exposure
- giving Rh- mothers with Rh+ fetuses ANTI-RH ANTIBODIES will prevent sensitization since the anti-Rh antibodies will coat fetal red blood cells and render them "invisible" to mother's system and will not induce mother's own system to mount a response.
- pancreas is an exocrine gland
- exocrine glands --> secretes products into tubes/ducts that empty into epithelial cells
- endocrine glands --> secretes hormones directly into bloodstream
- albumin should not be found in urine normally
- mammalian dive reflex --> increases heat retention
- mitochondrial DNA replicates randomly --> i.e. it can replicate during all phases G1, S, G2, M
- in questions regarding absolute config --> CHECK THAT MOLECULES ARE CHIRAL FIRST!
- racemization --> 50% R, 50% S (something that changes config for each molecule incorporates at 1/2 rate of racemization since inversion of half of molecules => racemized)
--------------------------------------
- grounding provides path of lesser resistance --> most current will flow through (rendering defibrillator ineffective)
- work done by gravity depends only on the displacement in the same direction as the force (i.e. vertically down). thus, on an inclined plane, the work done = mgh. (don't need to calculate angle)
- w = 2*pi*f, w = sqrt(k/m) => f = 1/(2*pi) * sqrt(k/m)
