A Neuroscientist Analyzes the Central Nervous System of a 3-Week-Old

question 186

Multiple Choice

A neuroscientist analyzes the central nervous system of a 3-week-old human embryo.She is MOST likely to observe:

• A)only a neural tube.
• B)the beginnings of forebrain and hindbrain development.
• C)the major subdivisions of the hindbrain but not the forebrain.
• D)the major subdivisions of the forebrain but not the hindbrain.

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Definitions:

Nasolacrimal Duct

The passageway that drains tears from the eye into the nasal cavity, allowing for tear drainage.

Lacrimal Fluid

Fluid produced by the lacrimal glands in the eyes, commonly known as tears, which keeps the eyes lubricated.

Nose

A facial organ containing the nostrils and used for breathing and smelling.

Eye's Lens

A transparent structure in the eye that focuses light on the retina to produce clear images.