water

Question 1

Question: What is the apoplastic pathway in plant roots?

Answer 1

Answer: The apoplastic pathway involves the movement of water and solutes through the cell walls and intercellular spaces, bypassing the living cells.

Question 2

Question: What is the symplastic pathway in plant roots?

Answer 2

Answer: The symplastic pathway involves the movement of water and solutes through the living cells of the root, via plasmodesmata that connect the cytoplasm of adjacent cells.

Question 3

Flashcard 3:
Question: What is the Casparian strip and where is it located?

Answer 3

Answer: The Casparian strip is a band of suberin present in the cell walls of endodermal cells in the root. It acts as a selective barrier and blocks the movement of water and solutes in the apoplastic pathway.

Question 4

Flashcard 4:
Question: What happens when water and solutes encounter the Casparian strip?

Answer 4

Answer: When water and solutes reach the Casparian strip, they must cross the strip to enter the symplastic pathway. This crossing occurs through the plasma membrane of endodermal cells.

Question 5

Question: What is the transmembrane pathway in plant roots?

Answer 5

Answer: The transmembrane pathway combines elements of the apoplastic and symplastic pathways. It involves the initial movement of water and solutes through the apoplast, followed by the active transport of certain solutes across the plasma membrane of endodermal cells into the symplast.