Multiple Choice
Why does rapid movement of water molecules across the plasma membrane of a plant cell occur?
34. Vascular Plant Transport
Water Potential
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Which of the cells below are involved with bulk flow?
A
Tracheids, vessels, and guard cells
B
Tracheids, plasmodesmata, and sieve tubes
C
Guard cells, vessels, and sieve tubes
D
Tracheids, vessels, and plasmodesmata
E
Tracheids, vessels, and sieve tubes
Verified step by step guidance1
Understand the concept of bulk flow: Bulk flow is the movement of substances in bulk or mass from one place to another, often driven by pressure differences. In plants, this typically involves the movement of water and nutrients through the vascular system.
Identify the role of tracheids: Tracheids are elongated cells in the xylem of vascular plants that facilitate the transport of water and minerals from the roots to other parts of the plant. They are involved in bulk flow due to their role in water transport.
Identify the role of vessels: Vessels are another type of cell found in the xylem. They are more efficient than tracheids in conducting water due to their larger diameter and are also involved in bulk flow.
Identify the role of sieve tubes: Sieve tubes are part of the phloem and are responsible for transporting sugars and other organic nutrients throughout the plant. This transport is also a form of bulk flow, driven by pressure differences.
Evaluate the options: Based on the roles of tracheids, vessels, and sieve tubes in facilitating bulk flow, the correct combination of cells involved in bulk flow is tracheids, vessels, and sieve tubes.
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