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Biology test

TermDefinition
Passive Transport movement across the cell membrane that does not require energy from the cell
Concentration Gradient A difference in the concentration of a substance across a space
Equilibrium A condition in which the concentration of a substance is equal across a space
Diffusion The movement of substance from an area of high concentration caused by the random motion of particles of the substance
Osmosis the diffusion of water through a selectively permeable substance
Hypertonic when water diffuses out of the cell, and causes the cell to shrink
Hypotonic water move in, it causes the cell to swell because of osmosis
Isotonic No net water movement, a solution that produces no change in cell volume because of osmosis (cytoplasm) and the fluid outside the cell have the same concentration of free water molecules
Covalent Bonds Sharing of electrons
Hydrogen Bonds an negative molecule connects to a postive molecule, creating a partially charged molecule
Ionic Bonds a stealing of electrons
Non-polar covalent an equal sharing of electrons
Polar Covalent non-equal sharing of electrons
Name the Four life molecules Lipids, Carbohydrates, Proteins, and Nucleic Acids
Hydrocarbon long strands of carbon and hydrogen surrounding it
Metabolism I eat, I break it down, I use it (energy)
Carbohydrates Carbon, Hydrogen, and oxygen 1:2:1 ratio
Complex carbohydrates cellulose, starch and glycogen
Lipids Major energy storer used in cell membrane men and women store it differently
Protein Copy dan, they contain nitrogen, made of amino acids, held together by peptide bonds, Sub groups: enzymes, antibodies, and protein hormones
Nucleic Acids Dna, Rna, nucleotides
Active Transport diffusion from low to high concentration using energy
 

 



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