The Root Endodermis

question 34

Multiple Choice

The root endodermis

• A) forms a boundary between the cortex and inner vascular cylinder of the root.
• B) contains impermeable lignin and suberin called a Casparian strip that controls water and nutrient movement between adjacent cell walls.
• C) is two to three layers of spherical cells.
• D) All of the choices are true of root endodermis.
• E) forms a boundary between the cortex and inner vascular cylinder of the root and contains impermeable lignin and suberin called a Casparian strip that controls water and nutrient movement between adjacent cell walls is correct.

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Definitions:

T-tubules

Tubular extensions of the cell membrane into muscle cells, facilitating rapid transmission of action potentials to ensure efficient contraction.

Desmosomes

Specialized cell structures that function as anchors, attaching cells together within tissues like the skin and heart muscle.

Gap Junctions

Specialized cell-to-cell connections that allow for the direct passage of ions, molecules, and electrical impulses between adjoining cells.

Sarcoplasmic Reticulum

Endoplasmic reticulum of muscle.