BIOLOGY: CONCEPTS&INVEST. (LL)
5th Edition
ISBN: 9781264706983
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 was used with a small length of rubber tubing fixed to the bottom on which a clamp could be fitted to start/stop the flow of water (Figure 1). Effluent was collected in a beaker and mean flow rate was calculated (mL/s), and a stopwatch was used to measure how long it took for 5 mL of liquid to flow out. For the subsequent sections of the practical, a 25-mL burette was used, and the top was connected via rubber tubing to a 5-liter reservoir placed on the shelving above the bench. The tubing at the base was connected to the different flow modules that comprised the different configurations of tubes to be tested.
a. Interpret the graph.
b. What does this relate to in the cardiovascular system, and is it something that can change? How?
c. What would be the implications for our ability to control blood flow to different tissues, if this were the only control mechanism available?
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Chapter 23 Solutions
BIOLOGY: CONCEPTS&INVEST. (LL)
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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