The neuraxis runs in a straight line
A)parallel to the ground in four-legged animals and humans.
B)perpendicular to the ground in four-legged animals and humans.
C)parallel to the ground in four-legged animals but makes a 90 degree turn in the brains of humans.
D)parallel to the ground in humans but makes a 90 degree turn in the brains of four-legged animals.

Question

The neuraxis runs in a straight line​ 
A)parallel to the ground in four-legged animals and humans. 
B)perpendicular to the ground in four-legged animals and humans. 
C)parallel to the ground in four-legged animals but makes a 90 degree turn in the brains of humans. 
D)parallel to the ground in humans but makes a 90 degree turn in the brains of four-legged animals.

Quizplus · Accepted Answer

The neuraxis runs parallel to the ground in four-legged animals but makes a 90 degree turn in the brains of humans. This turn is called the "flexure" and allows for the human brain to have a more vertical orientation while still being connected to the spinal cord.

The Neuraxis Runs in a Straight Line​

The Neuraxis Runs in a Straight Line