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61 Cards in this Set

  • Front
  • Back
light microscope
lenses and light rays to produce an image that the human eye can see
electron microscope
use magnetic lenses and electrons to produce an image that is projected onto film or a computer screen that humans view
1 meter equals...
1 billion nanometers
micrometer equals...
1 millionth of a meter
organelle
performs specific job required by cell
nucleus
spherical structure that houses DNA and serves as the cells control center
how many membranes surround nucleus?
two--called nuclear envelope
nuclear pores
regulate "traffic" in and out of the cell
chromatin
composed of DNA and protiens
nucleolus
where ribosomes are made
nucleoplasm
fluid inside nucleus
cytosol
watery matrix containing salts and many of the enzymes required for cellular reactions
what surrounds organelles?
cytosol
cytoplasm
includes cytosol and organelles
mitochondria
energy harvesting organelles surrounded by 2 membranes
what carries protiens involved in ATP?
mitochondria
lysosome
membrane enclosed sac of enzymes that degrade protiens, carbs, and fats
ribosome
"work benches" where amino acids are joined together to produce protiens
what are built in the nucleus and shipped out through nuclear pores?
ribosomes
endoplasmic reticulum
large network of membranes that begins at the nuclear envelope and extends into the cytosol
rough ER
when ribosomes are attached to the ER
rough ER synthesizes what?
protiens
smooth ER
detoxifies harmful substances and synthesizes lipids
golgi apparatus
stack of membrane sacs
vesicles
membrane sacs-pinched off from the ER abd travel to fuse w/ the golgi appartus & empty their protein contents
centrioles
barrel-shaped structures composed of structural proteins called microtubules
what facilitates chromosome movement during cell division?
microtubules
cytoskeleton
network of filaments and tubules found in the cytoplasm that help cell maintain structure and help it move
plasma membrane
outermost boundary of cell in which it isolates the cell contents from the environment and serves as a barrier that determines that goes in and out of the cell
phospholipid bilayer
tails of phospholipids interact w/ themselves and exclude water while the heads maximize their exposure to water both inside and outside membrane
glycolipids
when carbohydrates are attached to PB
diffusion
movement of molecules from high concentration to low concentration
what does diffusion NOT require
an input of outside energy
passive transport
when substance diffusion happens across the membrane
what kind of molecules can do passive transport?
very small, hydrophobic ones
facilitated diffusion
diffusion of molecules through protein channels
what does FD NOT require?
an input of outside energy
osmosis
the movement of water in response to a concentration gradient
tonicity
concentration of solute in a solution
isotonic
same concentration of solute outside as in inside the cell
hypertonic
higher concentration of solute outside than inside cell
hypotonic
lower concentration of solute outside than inside cell
active transport
transport that uses proteins powered by ATP to move substances up/against a concentration gradient
exocytosis
when membrane-bounded vesicle carrying some substance fuses w/ the plasma membrane and secretes its contents into exterior of the cell
endocytosis
when a substance is brought into the cell and the plasma membrane buds inward bringing the substance with it
catalyze equals...
speed up rate of reaction
activation energy
energy required to start the metabolic process
substrates
chemicals that are metabolized by an enzyme-catalyzed reaction
active site
the region of the enzyme where the substrate binds
induced fit
shape change by the enzyme in response to substrate binding
carbon monoxide
toxic gas that prevents blood cells from carrying oxygen from the lungs to the rest of the body
half life of nicotine
2-3 hours
titration hypothesis
smokers will adjust their amount of ciggs smoked in order to achieve a steady level of nicotine in their body
Coronary heart disease (CHD)
heart is damaged by the restriction of blood flow through narrowed or blocked coronary arteries
arterosclerosis
walls of arteries harden and lose their elasticity
atherosclerosis
fatty deposits inside arteries impede blood flow
ischemic stroke
reduction of blood flow causes damage to the brain
sinsemilla
marijuana obtained from unpollinated/seedless portion of cannabis plants (15%THC)
hasish
resin is scraped from cannabis leaves and then dried (24%THC)
hasish oil/crystal
boiling hash in alcohol and filtering alcohol out- leaving residue on leaves (15-60% THC)
anadamide
naturally occurring chemical in the brain that fits into the THC-sensitive receptor sites