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Bio. Test 2
N/A
111
Biology
Undergraduate 1
02/28/2012

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Term
Diffusion
Definition
movement down a concentration gradient
Term
Electrochemical gradient
Definition
diffusion of charged particles depends on combination of concentration and electrical gradient
Term
Osmosis
Definition
diffusion of water down the concentration gradient across a selectively permeable membrane
Term
Osmolarity
Definition
determined by the combined concentration of all solutes in a solution
Term
Water potential
Definition
overall tendecy of water to move
Term
Make up of water potential
Definition
pressure potential, solute potential, and matrix potential
Term
Channel protein
Definition
molecules can go directly thorough
Term
Carrier protein
Definition
requires confirmational change. (changes shape)
Term
Active Transport
Definition
movement against the concentration gradient
Term
Surface Area to Volume ratios
Definition
as an organism gets larger, its center is further from the surface
Term
Permeation
Definition
tendency to allow a substance across a membrane
Term
Physiological regulation
Definition
balancing of homeostasis, negative feedback loops. maintains constant environment
Term
Internal environment regulation
Definition
body and interstital fluid. actively regulated
Term
negative feedback loop
Definition

control regulation. 

major components: regulated variable, control center, effector

Term
Signal and Response
Definition
response is what happens from a signal
Term
extracellular fluid
Definition
fluid within the body but outside of cells
Term
Characteristics of kingdom Plantae:
Definition
plastid- chloroplast or photosynthetic organelle
Term
endosymbiotic theory
Definition
mitochondria nad plastid got absorbed by a prokaryote and developed a relationship with the host cell.
Term
Unique to plants:
Definition
cell walls, vacuole, and chloroplast
Term
Root system
Definition
below ground, water and nutirent uptake, anchoring the plant
Term
Shoot system
Definition
above ground, stem, leaves, flowers, harvest light and carbon dioxide, gas exhange, making sugars, and reproduction
Term
Plant growth
Definition
meristerms
Term
meristem
Definition
group of undifferentiated cells at the tip of the plant
Term
Dermal tissue
Definition
epidermis and periderm 
Term
Vascular tissue
Definition
xylem and phloem
Term
Ground tissue
Definition
parenchyma, collenchyma, sclerenchyma
Term
Xylem
Definition
water conduction
Term
phloem
Definition
food conduction
Term
Cohesion- Tension theory
Definition
water is pulled by transipiration and cohesion
Term
Transpiration
Definition
evaporation of water molecules
Term
Solute Potential
Definition
low solute concentration to high solute concentration
Term
Pressure Potential
Definition
tendency to move due to physical pressure on the water
Term
Vascular Cambium
Definition
line dividing phloem and xylem
Term
Secondary growth
Definition
growth in width
Term
Primary growth
Definition
growth in height
Term
Translocation
Definition
movement of sugars throughout a plant
Term
Signal
Definition
something that elicits a response
Term
Transduction
Definition
transfer of a signal
Term
Hormones
Definition
organic molecule made by the plant. intiates response.
Term
Trophism
Definition
directional growth response. 
Term
morphogensis
Definition
non directional growth response
Term
phototrophism
Definition
gorwth from light
Term
gravitrophism
Definition
growth in response to gravity
Term
thigmotrophism
Definition
growth from touch
Term
Auxin
Definition
stimulates stem elongation. type of hormone
Term
Stomata
Definition
pores in leaf to allow gas exchange. concentrated under the blade (under the leaf)
Term
Plastid
Definition
major organelle within a cell (chloroplast)
Term
root cap
Definition
small group of cells that covers and protects the tip of a plant
Term
root hairs
Definition
outgrowth of epidermal cells on the root, maximizes surface area
Term
Cohesion
Definition
tendency of molecules to stick together
Term
cell wall
Definition
fibrous layer found outside the plasma membrane
Term
plasmodesmata
Definition
connection between of two cells with gaps in the cell wall
Term
vacuole
Definition
a large organelle in plant cells, storage of water
Term
totipotent
Definition
undifferentiated cells
Term
tracheid
Definition
long thin water conducting cell
Term
vessel element
Definition
short and wide water conducting cell
Term
Sieve tube member
Definition
elongated sugar conducting cell in phloem, sive plates at both ends
Term
Phototrophins
Definition
photoreceptors that detect blue light.
Term
epidermis
Definition
outer most layer of cells
Term
Companion cells
Definition
specialized paremchyma cells
Term
Cuticle
Definition
protective waxy coating
Term
Wood
Definition
xylem resulting from secondary growth
Term
Stamen
Definition

male reproductive parts

anther

filament

Term
Carpel
Definition

Female Reproductive Parts

Stigma

Style

Ovary

Term

Bisexual

 

Definition

Have both carpel and stamen

 

Term

Unisexual

 

Definition
Have one or the other (Carpel or Stamen)
Term
pollination
Definition
pollen is transported from the anther to the stigma of a flower
Term
dipoblasts
Definition

two types of tissue:

1) ectoderm

2) endoderm 

Term
tripoblasts
Definition
3 types of tissue, added mesoderm 
Term
radial symmetry 
Definition
more than one mirror image can be formed; has nerve net 
Term
bilateral symmetry
Definition
one mirror image can be formed; has CNS 
Term
cephalization 
Definition
evolution of a head region 
Term
coelom
Definition
enclose fluid filled cavity 
Term
acoelomates
Definition
no coelom 
Term
ceolomates
Definition
have a ceolman between two layers of mesoderm 
Term
pheudocoelomates
Definition
cavity between mesoderm and endoderm 
Term
exoskeleton
Definition
stiff external covering (arthopod)
Term
endoskeleton
Definition
stiff internal bones (vertebrae)
Term
hydrostatic skeleton
Definition
fluid filled chambers under pressure (analids) 
Term
protosomes
Definition
development of the mouth first (arthopods, moluska, analida, nemotoda) 
Term
deuterostomes
Definition
developed anus first (chordates, echinoderms) 
Term
suspesion feeder 
Definition
capturing food by filtering out or concentrating (whale) 
Term
deposit feeders
Definition
ingest organic material (analids, worms) 
Term
fluid feeders
Definition
feed on liquids (butterflies, leeches, aphids, vampires (Edward Cullen))
Term
Mass feeder
Definition
chucks of food in their mouth (humans (chicken nuggets))
Term
Undulation 
Definition
allows swimming or shake like motion; using hydrostatic or endoskeleton
Term
Peristalisis
Definition
allows creeping movement; uses hydrostatic skeleton (Martin the creeper) 
Term
locomotive appendages
Definition
use for moving (sex) 
Term
Cilia and Flagella 
Definition
moves small animals
Term
unjoited limbs
Definition
hydrostatic support (tubed feet, in echinoderms)
Term
jointed limbs 
Definition
vertebrae and arthopod limbs
Term
Oviporous
Definition
lay eggs in which young develop
Term
viviporous
Definition
young develop internally; supported by parents 
Term
ovoviviparous
Definition
young develop in eggs retained by parents 
Term
hemimetabolous
Definition
young looks like adults
Term
holometabolous
Definition
immature stage and mature stage
Term
detritavore 
Definition
feed on dead organic matter
Term
segmentation
Definition
body is split up into different parts (lobster and worm) 
Term
larva
Definition
immature stage of species 
Term
pupation
Definition
larva is formed into adult
Term
porifera--phyla
Definition
aquatic; filter feeders; no body layers; no symmetry 
Term
cnidaria--phyla
Definition
radial symmetry; dipoblasts; gastrovascular cavity
Term
lophotrochozoa
Definition

grow incrementally without molting or shedding:

platyhelninthes 

annelida

mollusca

 

Term
annelida
Definition
segmented worms; gut with two openings
Term
mollusca
Definition
bivalve; muscular foot; secreted shell; ragula; mantle
Term
ecdysozoa
Definition
grow by molting; gut with two openings (nemotoda, arthopoda) 
Term
achinodermata
Definition
radial symmery; subdermal endoskeleon; tubed feet; limited cepholization
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