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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Transcribed Image Text:This diagram illustrates an idealized cross-section of an endodermal cell with a Casparian
strip (thick backline) in the radial walls and a single plasmodesma in each of the tangential
walls. Adjacent cortical cells are to the left, and adjacent cells of the vascular cylinder are to
the right. The endodermal cells are living and have a plasma membrane (not illustrated).
The solid arrows illustrate the symplastic movement of water and ions and the dashed
arrow illustrates the path of water and solvent moving through the apoplast.
Symplastic.
flow
Apoplastic
flow
CORTEX →+ ENDODERMIS →E VASCULAR CYLINDER
Explain the functional significance of the pathway illustrated by the dashed arrow.
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