CHAPTER 8 FLASHCARD LOVELIES SB025

Front

What are the three pathways for water movement in plant roots?

Back

Apoplastic, symplastic, transmembrane routes

Front

What is the apoplastic pathway?

Back

Water moves through cell walls and intercellular spaces

Front

What is the symplastic pathway?

Back

Water moves through cytoplasm via plasmodesmata

Front

What is the transmembrane pathway?

Back

Water moves across cell membranes through cytoplasm and vacuoles

Front

What prevents water loss in the root endodermis?

Back

Casparian strip

Front

What are the three forces responsible for water transport in xylem?

Back

Root pressure, cohesion-tension, transpiration pull

Front

What is root pressure?

Back

Pressure generated by active mineral absorption, pushing water upward

Front

What is transpiration pull?

Back

Water loss from leaves creates negative pressure, pulling water up

Front

What is cohesion-tension theory?

Back

Water molecules stick together (cohesion) and adhere to xylem walls

Front

How do guard cells regulate transpiration?

Back

By opening and closing stomata