**Title: Understanding Xylem Elements and Conductance Through Pressure Changes** **Description:** Examine the sketch of the xylem elements below (they are displayed horizontally to save page space). These elements are labeled from top to bottom as A, B, C, and D. In examining the graph below, provide the sequence from left to right that you would expect the vessel elements to fall on the graph. **Diagram Explanation:** 1. **Sketch of Xylem Elements:** - The diagram shows four xylem elements arranged horizontally. These are key components for water transport in plants. The elements are labeled from top to bottom as A, B, C, and D. 2. **Graph Explanation:** - **Axes:** - The x-axis represents Xylem Water Pressure in Megapascals (Mpa) ranging from -12 to 2. - The y-axis represents the Percent Loss in Xylem Conductance, ranging from 0 to 120%. - **Curve Description:** - The graph illustrates a relationship between increasing negative water pressure and an increase in percent loss of xylem conductance. - As the xylem water pressure becomes more negative, from 0 Mpa moving leftwards past -4 Mpa, there is a sharp increase in conductance loss from 0% to 100%. - The slope becomes steep around -6 to -8 Mpa, indicating a critical threshold where conductance is significantly impaired. **Educational Context:** Understanding the function and vulnerability of xylem vessels under varying pressures is crucial for comprehending how plants manage water stress. This concept is essential in fields such as botany, ecology, and agricultural sciences. **Application Question:** Using the diagram and graph, predict the order in which xylem vessels A, B, C, and D might collapse or lose conductance effectively as pressure continues to drop.
**Title: Understanding Xylem Elements and Conductance Through Pressure Changes** **Description:** Examine the sketch of the xylem elements below (they are displayed horizontally to save page space). These elements are labeled from top to bottom as A, B, C, and D. In examining the graph below, provide the sequence from left to right that you would expect the vessel elements to fall on the graph. **Diagram Explanation:** 1. **Sketch of Xylem Elements:** - The diagram shows four xylem elements arranged horizontally. These are key components for water transport in plants. The elements are labeled from top to bottom as A, B, C, and D. 2. **Graph Explanation:** - **Axes:** - The x-axis represents Xylem Water Pressure in Megapascals (Mpa) ranging from -12 to 2. - The y-axis represents the Percent Loss in Xylem Conductance, ranging from 0 to 120%. - **Curve Description:** - The graph illustrates a relationship between increasing negative water pressure and an increase in percent loss of xylem conductance. - As the xylem water pressure becomes more negative, from 0 Mpa moving leftwards past -4 Mpa, there is a sharp increase in conductance loss from 0% to 100%. - The slope becomes steep around -6 to -8 Mpa, indicating a critical threshold where conductance is significantly impaired. **Educational Context:** Understanding the function and vulnerability of xylem vessels under varying pressures is crucial for comprehending how plants manage water stress. This concept is essential in fields such as botany, ecology, and agricultural sciences. **Application Question:** Using the diagram and graph, predict the order in which xylem vessels A, B, C, and D might collapse or lose conductance effectively as pressure continues to drop.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Transcribed Image Text:**Title: Understanding Xylem Elements and Conductance Through Pressure Changes**
**Description:**
Examine the sketch of the xylem elements below (they are displayed horizontally to save page space). These elements are labeled from top to bottom as A, B, C, and D. In examining the graph below, provide the sequence from left to right that you would expect the vessel elements to fall on the graph.
**Diagram Explanation:**
1. **Sketch of Xylem Elements:**
- The diagram shows four xylem elements arranged horizontally. These are key components for water transport in plants. The elements are labeled from top to bottom as A, B, C, and D.
2. **Graph Explanation:**
- **Axes:**
- The x-axis represents Xylem Water Pressure in Megapascals (Mpa) ranging from -12 to 2.
- The y-axis represents the Percent Loss in Xylem Conductance, ranging from 0 to 120%.
- **Curve Description:**
- The graph illustrates a relationship between increasing negative water pressure and an increase in percent loss of xylem conductance.
- As the xylem water pressure becomes more negative, from 0 Mpa moving leftwards past -4 Mpa, there is a sharp increase in conductance loss from 0% to 100%.
- The slope becomes steep around -6 to -8 Mpa, indicating a critical threshold where conductance is significantly impaired.
**Educational Context:**
Understanding the function and vulnerability of xylem vessels under varying pressures is crucial for comprehending how plants manage water stress. This concept is essential in fields such as botany, ecology, and agricultural sciences.
**Application Question:**
Using the diagram and graph, predict the order in which xylem vessels A, B, C, and D might collapse or lose conductance effectively as pressure continues to drop.
Expert Solution
Step 1
Introduction :- Xylem is the specialised vascular tissue which transports the water molecule or water dissolved molecules from roots to the all parts of plants like stem ,leaves ,branches etc. Xylem contains four components which are as follow : tracheids , fibres , parenchyma ,vessels .It is a type of complex tissue and it is a dead tissue because all components present in this tissue are dead except xylem parenchyma.It also provide physical strength or support to plants .
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