The Function of a Patent Opening Between the Left and Right

question 21

Multiple Choice

The function of a patent opening between the left and right atria in a fetus is that it allows:

• A)right-to-left blood shunting.
• B)left-to-right blood shunting.
• C)blood to flow from the umbilical cord.
• D)blood to flow to the lungs.

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Definitions:

Retina

A layer of cells at the back of the eyeball containing photoreceptor cells, which convert light into electrical signals for vision.

Lens

A piece of transparent material, usually made of glass or plastic, which refracts or focuses light rays, often used in glasses, cameras, and microscopes.

Amplitude

In the context of waves, it is the height of the wave from its resting position, indicating the wave's strength or intensity.

Brightness

This is perceived as the intensity or luminosity of light emitted or reflected by an object.