Unit Test Answers

The concentration of sodium on the inside of the cell is 20 mM. The outside of the cell has a sodium concentration of 115 mM. Which mechanism of ion uptake would best move sodium from the inside of the cell to the outside?

Which homeostatic process is characterized by the diffusion of only water molecules?

According to the endosymbiotic theory, which cellular process was involved in the evolution of mitochondria and chloroplasts?

The table lists some organelles and functions. Only one pair is correctly matched.Functions of OrganellesOrganelleFunctionLysosomeStores water and waste materialsVacuoleBreaks down sugarsMitochondrion Breaks down waste materials and debrisRibosomeProduces proteins for the cellWhich organelle in the table is correctly matched with its function?

What is the maximum magnification of most classroom compound light microscopes?

The table lists some organelles and functions. Only one pair is correctly matched.Functions of OrganellesOrganelleFunctionNucleusDirects cell activityEndoplasmic reticulumBreaks down sugar molecules to supply energyGolgi apparatusSupports and protects organelles in the cellLysosomeProduces proteins for the cellWhich organelle in the table is correctly matched with its function?

Which refers to the maintenance of a stable internal environment despite changing external conditions?

Which is a function of the cell membrane?

Which two microscopes generate three-dimensional images?

Smooth muscle, which is a tissue made up of a type of specialized muscle cell, functions in which process?

Which best describes stem cells?

Which structure will form when a primitive cell engulfs an aerobic bacterium?

The data in the graph are the result of a paramecium being placed in a hypertonic salt solution.Based on the data in the graph, which would most likely happen if the paramecium were placed in distilled water?

What is shown in the image?

A patient is in need of hydration. Which type of solution are the patient’s cells most likely in?