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Biology test
Term | Definition |
---|---|
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 |