At Which Gestational Age Do Basic Heart Structures, Major Blood

question 3

Multiple Choice

At which gestational age do basic heart structures, major blood vessels, lymph nodes, and ducts form?

• A) month 6
• B) month 8
• C) month 4
• D) month 7
• E) month 2

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Definitions:

Intracellular

Located or occurring within a cell or cells.

Extracellular

Located or occurring outside the cell, often referring to the environment or substances in the space surrounding cells.

Chemical Signals

Molecules released by cells that have the effect of altering the metabolism, growth, or activity of other cells that possess receptors for the signal.

Electrical Signals

Impulses generated by the movement of ions, essential for the functioning of neurons and the communication within and between neural circuits.