Plant Water Transport Mechanisms

The video explains how plants absorb water from the soil using their roots, which act like natural straws. It covers the structure of root cells, including the epidermis and plasmodesmata, and describes three pathways for water transport: vacuolar, symplast, and apoplast. The vacuolar pathway faces high resistance and is rarely used. The symplast pathway involves osmosis and cytoplasm movement, while the apoplast pathway is blocked by the Casparian Strip, leading to root pressure. Water eventually reaches the xylem, stem, and leaves.

What part of the plant acts like a natural straw to absorb water from the soil?

• Leaves

• Stems

• Flowers

• Roots

Which structure connects plant cells and allows water movement in the vacuolar pathway?

• Mitochondria

• Chloroplast

• Plasmodesmata

• Cell wall

Why is the vacuolar pathway rarely used for water transport in plants?

• It is energy-consuming

• It is too direct

• It faces high resistance

• It is too fast

In the symplast pathway, how do water molecules move between cells?

• Through the Casparian Strip

• Via active transport

• Through the cell wall

• By osmosis through plasmodesmata

What prevents water from crossing the endodermis in the apoplast pathway?

• Nucleus

• Casparian Strip

• Vacuole

• Cell membrane

What is the role of Suberin in the apoplast pathway?

• It facilitates water movement

• It blocks water movement

• It stores water

• It transports nutrients

After being blocked by the Casparian Strip, how do water molecules continue their journey?

• They evaporate

• They move back to the soil

• They are absorbed by leaves

• They switch to the symplast pathway