Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Chapter 23, Problem 13WIO
Summary Introduction
To determine:
The nonbiological analogies for Casparian strip and for pressure flow theory.
Concept introduction:
Casparian strip is a band of suberin and lignin substances deposited in the wall of endodermis. It is chemically distinct from the cell wall.
Pressure flow theory explains the mechanism of phloem transport from source to sink.
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For investigating the effect of pressure (height of a column of liquid), a 50-mL burette wasused with a small length of rubber tubing fixed to the bottom on which a clamp could befitted to start/stop the flow of water (Figure 1). Effluent was collected in a beaker and meanflow rate was calculated (mL/s), and a stopwatch was used to measure how long it took for5 mL of liquid to flow out. For the subsequent sections of the practical, a 25-mL burette wasused, and the top was connected via rubber tubing to a 5-liter reservoir placed on theshelving above the bench. The tubing at the base was connected to the different flowmodules that comprised the different configurations of tubes to be tested.
Figure 1: A. Theoretical set-up of the experiment. B. Flow rate data with increasing pressure
a. Interpret the graph.b. What does this relate to in the cardiovascular system, and is it something that canchange? How?c. What would be the implications for our ability to control blood flow to different…
Chapter 23 Solutions
Biology: Concepts and Investigations
Ch. 23.1 - How do plants acquire C, H, O, N, and P?Ch. 23.1 - Prob. 2MCCh. 23.1 - Prob. 3MCCh. 23.2 - Prob. 1MCCh. 23.2 - Prob. 2MCCh. 23.2 - Prob. 3MCCh. 23.3 - Prob. 1MCCh. 23.3 - Prob. 2MCCh. 23.3 - Prob. 3MCCh. 23.4 - Prob. 1MC
Ch. 23.4 - Prob. 2MCCh. 23.5 - Prob. 1MCCh. 23.5 - Prob. 2MCCh. 23.5 - Prob. 3MCCh. 23 - Prob. 1MCQCh. 23 - Prob. 2MCQCh. 23 - Prob. 3MCQCh. 23 - Prob. 4MCQCh. 23 - Prob. 5MCQCh. 23 - Prob. 6MCQCh. 23 - Prob. 7MCQCh. 23 - Explain the relationship between transpiration and...Ch. 23 - Prob. 2WIOCh. 23 - Prob. 3WIOCh. 23 - Prob. 4WIOCh. 23 - Prob. 5WIOCh. 23 - Prob. 6WIOCh. 23 - Prob. 7WIOCh. 23 - Prob. 8WIOCh. 23 - Prob. 9WIOCh. 23 - Prob. 10WIOCh. 23 - Prob. 11WIOCh. 23 - Prob. 12WIOCh. 23 - Prob. 13WIOCh. 23 - Prob. 1PITCh. 23 - Prob. 2PITCh. 23 - Prob. 3PIT
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