34. Vascular Plant Transport

The purpose of the xylem is to __________.

The proton pump in plant cells __________.

A plant cell placed in a solution with a higher water potential will __________.

The water potential of a cell is defined by the equation Ψ = Ψ_S + Ψ_P. Which of the following statements is true?

Which of the following is an adaptation that enhances the uptake of water and minerals by roots?a. mycorrhizaeb. pumping through plasmodesmatac. active uptake by vessel elementsd. rhythmic contractions by cells in the root cortex

Fill in the blanks in this concept map to help you tie together key concepts concerning transport in plants.

Which structure or compartment is part of the symplast?a. the interior of a vessel elementb. the interior of a sieve tubec. the cell wall of a mesophyll celld. an extracellular air space

What important role does the Casparian strip play in the movement of water through plants?a. forces water to move through the cytoplasm of living endodermal cells as it makes its way from the soil to the xylemb. causes cells to shrink, thereby increasing pressure within cellsc. loads sugars into xylem, thereby causing water to enter the xylem by osmosisd. acts as a filter that prevents salts, heavy metals, and other pollutants from entering root hairs