Which of the Following Statements Concerning the Embryonic Circulatory System

question 96

Multiple Choice

Which of the following statements concerning the embryonic circulatory system is true?

• A)The heart develops from four endothelial tubes.
• B)Blood vessels form from blood islands.
• C)An opening in the interatrial septum is called the sinus venosus.
• D)The bulbus cordis becomes the sinoatrial node (the adult pacemaker).
• E)There is an opening in the interventricular septum.

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Definitions:

Increasing pKa

This refers to the process or trend of increasing the acidity constant (pKa), indicating a decrease in acid strength.

Resonance Structures

Different Lewis structures for the same molecule that depict different possible arrangements of electrons.

AntiAromatic

Refers to organic compounds that are cyclic, conjugated, contain a planar ring system, but do not follow Huckel's rule, resulting in increased instability.

Pyrrole

A heterocyclic aromatic organic compound, a five-membered ring with the formula C4H5N, containing a nitrogen atom.