5 Written questions
5 Matching questions
- receptor-mediated endocytosis
- cellular respiration
- a The aerobic harvesting of energy from food molecules; the energy-releasing chemical breakdown of food molecules, such as glucose, and the storage of potential energy in a form that cells can use to perform work; involves glycolysis, the citric acid cycle, and oxidative phosphorylation (the electron transport chain and chemiosmosis).
- b Thermal energy; the amount of energy associated with the movement of the atoms and molecules in a body of matter. Heat is energy in its most random form.
- c Cellular "drinking"; a type of endocytosis in which the cell takes fluid and dissolved solutes into small membranous vesicles.
- d Cellular "eating"; a type of endocytosis whereby a cell engulfs macromolecules, other cells, or particles into its cytoplasm.
- e The movement of specific molecules into a cell by the inward budding of membranous vesicles. The vesicles contain proteins with receptor sites specific to the molecules being taken in.
5 Multiple choice questions
- The spontaneous tendency of a substance to move down its concentration gradient from where it is more concentrated to where it is less concentrated.
- A description of membrane structure, depicting a cellular membrane as a mosaic of diverse protein molecules embedded in a fluid bilayer made of phospholipid molecules.
- The ability of a solution surrounding a cell to cause that cell to gain or lose water.
- The diffusion of water across a selectively permeable membrane.
- The diffusion of a substance across a biological membrane, without any input of energy.
5 True/False questions
second law of thermodynamics → The principle of conservation of energy. Energy can be transferred and transformed, but it cannot be created or destroyed.
metabolism → A transport protein in the plasma membrane of some plant or animal cells that facilitates the diffusion of water across the membrane (osmosis).
cofactor → A nonprotein molecule or ion that is required for the proper functioning of an enzyme. See also coenzyme.
potential energy → The energy of motion; the energy of a mass of matter that is moving. Moving matter does work by imparting motion to other matter.
aquaporin → A transport protein in the plasma membrane of some plant or animal cells that facilitates the diffusion of water across the membrane (osmosis).