Which Statement Is NOT True of the Placenta and Umbilical

question 147

Multiple Choice

Which statement is NOT true of the placenta and umbilical blood vessels?

• A)Two umbilical arteries take blood to the fetus.
• B)Maternal blood does not mix with fetal blood in the placenta.
• C)The umbilical vein contains blood with a high level of oxygen.
• D)In the placenta, exchanges take place by diffusion and active transport.

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Definitions:

Brightness

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

Optic Disc

A small, circular area in the retina where the optic nerve connects to the eye, marking the point of exit for retinal nerve fibers.

Optic Nerve

A paired nerve that transmits visual information from the retina to the brain.

Retina

The light-sensitive layer at the back of the eye that converts light into neural signals that the brain interprets as visual images.