A sodium/potassium pump is a neurotransmitter found in the cellular membrane of your cells where sodium and potassium ions pass between the interior and exterior cells. Suppose that each pump requires equal proportions of sodium and potassium ions. If the 5 food items from Question 1 were your only source of these electrolytes in a day, which would be the limiting reagent that would prevent these pumps from working? Explain your answer qualitatively and quantitatively. [4]

An alloy contains 66 g of pure zinc. what is the percentage of zinc in the alloy? express your answer to two significant figures and include the appropriate units.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.