The Valve That Channels Blood to Flow in One Direction

question 34

Multiple Choice

The valve that channels blood to flow in one direction from the left atrium to the left ventricle is the:

• A) semilunar valve.
• B) mitral valve.
• C) aortic valve.
• D) tricuspid valve.

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Definitions:

Endodermal Cells

Cells that make up the endoderm, the innermost layer of cells in early animal embryos, which eventually forms the lining of the digestive and respiratory systems.

Aquaporins

Protein channels in cell membranes that facilitate the transport of water and, in some cases, small solutes across the membrane.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy input usually in the form of ATP.

Primary Eudicot

A group within the angiosperms characterized by seeds with three protective coverings.