Damage to the Ventral Roots of the First Five Thoracic

question 216

Multiple Choice

Damage to the ventral roots of the first five thoracic spinal nerves on the right side of the body would interfere with the ability to

• A) constrict the left pupil.
• B) dilate the right pupil.
• C) constrict the right pupil.
• D) smile and frown.
• E) dilate the left pupil.

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Definitions:

Interatrial Septum

The wall of tissue that separates the right and left atria of the heart.

Septum Secundum

Second of two major septal structures involved in the partitioning of the atrium, arising later than the septum primum and located to the right of it; it remains an incomplete partition until after birth, with its unclosed area constituting the foramen ovale.

Foramen Rotundum

An opening in the sphenoid bone of the skull through which the maxillary branch of the trigeminal nerve passes.

Neural Tube

The precursor to the central nervous system in vertebrates, developing into the brain and spinal cord.