Heart Chamber Specification Is Dependent on the Loss,gain,or Limited Expression

question 5

Multiple Choice

Heart chamber specification is dependent on the loss,gain,or limited expression of several transcription factors.What pattern of expression supports specification and formation of the right ventricle?

• A) Loss of expression of Tbx5 within the primary heart field
• B) Loss of expression of Irx4 within the cranial portion of the primary heart field
• C) Restricted expression of RALDH-2 to the cranial portion of primary heart field
• D) Continued expression of Isl1 and Tbx1 within the secondary heart field

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Definitions:

Cholesterol

A waxy, fat-like substance that's found in all the cells in your body, where it's used to make hormones, Vitamin D, and substances that help you digest foods. Your body needs some cholesterol to function properly.

Glycolipids

Lipids with a carbohydrate attached by a glycosidic bond, playing a role in cell recognition and membrane structure.

Glycoproteins

Glycoproteins are proteins that have oligosaccharide chains (glycans) covalently attached to some of their amino acid residues, playing a critical role in cell-cell interactions and immune function.

Cell Recognition

A biological mechanism through which cells identify and interact with each other, playing a critical role in immune response, cellular adhesion, and communication.