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