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SECRETORY PATHWAYS:
cytoskeleton prot:
microfilaments-
ACTIN
= active polymerizes
(dimerize quickly, rolling motion)
(~amoebas)
cytoskeleton prot:
intermediate -
KERATIN (hair)
stacked & stayed that way
cytoskeleton prot:
microtubules -
dimer (α/β) (active polymol in big chain)
GTP
big hallow tube
9+2 = 20 microtubules
*imp in mitosis
CELL JUNCTIONS:
tight junctions =
Gut
Cell junct:
gap junctions =
cardiac cells
(proteinase bridge)
cell junct:
desmosomes =
spot wells
(holds together)
PLASMA MEMB:
size & charge
Signaling:
signal -
chemistry will dicate the signal
2 TYPES RESPONSES
extracellular
intracellular
extracellular:
things that does
NOT
cross memb
ex -> insulin = bind to receptor
intracellular:
that can pass through recept inside cell
ex -> steriod/TH (thyroid)
Transduction:
(1 insulin recept, transmit of signal through cell)
--> conduction & amplifications of signal
==> G- proteins
G - Proteins
facilitative diff --> go against gradient
2
o
active transport; protein helps
Transmemb transport:
pump -
(have to have) NRG
1o active transport
Na/K ATPase =
3 Na (OUT)/ 2 K (IN)
Transmemb transport:
channel -
specific for ions (smaller); passive (no NRG use; go down concent grad)
K+/ Na+/ Cl- DIFFUSION
carrier
TONICITY:
Osmolarity
omosis:
H2O diffusion across semi-permable memb
3 types of osmolarity:
hypertonic: crenation
hypotonic
: water in
[RBC (in H2O)→ H2O go into cell; H2O dilute what there plant cell = TURGID]
Isotonic:
CELL CYCLE:
Mitosis -
MITOSIS
→ 1 cell → 2 cells (identical)
2n (diploid) → 2n (2x)
Phases of mitosis:
PROPHASE = (1) condense chromosome (2) dissolve nucleus
METAPHASE = line-up in middle; kinetochore w/ microtub
"middle"
ANAPHASE = separate & move to centrioles
|
TELOPHASE = reform our nucleus
|
CYTOKINESIS = final separation
[probs that can happen]
NONDYSJUNCTION:
= part or whole of chromo
trisomy 21:
Down syndrome
3N -- 21 Chr
monosomy:
XO
Turner synd
MEIOSIS:
2N → N
diploid → haploid
serial/ sequential
mitosis w/ 1 maj differences
MEIOSIS I:
MEIOSIS II:
(2 laws)
Law of segregation = (mendel) always separate sister chrom
*only one copy allele/gamate*
Law of independent assortment =
*no linkage*
CLASSICAL GENETICS:
Law of Multiple -
AND
1/p x 1/r = 1/pr
CLASSICAL GENETICS:
Law of addition -
OR
1/p + 1/r = sum
GENETICS:
Codominance -
ABO blood types
AO/ BO/ AB
GENETICS:
Incomplete Dom -
Blending
(plant color --> red + white = pink)
neuron
(most basic unit/ functional unit)
neuron graph
3 types of neuron channels:
Ligand gated:
sm polar molec; binds → ∆ conformation
Voltage gated:
voltage which causes chann to open
Mechanical:
Na gated channel
axon --> AP
Refractory period: (2 types)
Absolute:
cannot
have 2nd AP
Relative:
can have 2nd AP stronger signal
Myelination:
(type of cells)
cellular insulation
CNS = oligodendocytes
PNS = schwann cells
Saltatory conduction:
jump from node to node
Nervous System - anatomical flow
CNS --> Frontal
sensory homonculi = integ all sensory mod
motor homonculi = controls somatic motor n.
CNS --> Occupital Lobe
visual sensation
lower brain --> mid brain, pons, medulla
Spinal cord anatomy
Cranial N.
Vagus N. = # of targets
nerves response examples
SENSORY
sight
smell
hearing
taste
touch
SIGHT
rods/cones
Sound
unrolled chlorea
vestibular system
3 diff angular
momentum vectors
Author
napoleon
ID
26526
Card Set
Biol 2
Description
Biol Class 2
Updated
2010-07-15T20:35:34Z
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