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 80-degree turn in the brains of humans.
D) parallel to the ground in humans but makes a 80-degree turn in the brains of four-legged animals.

Question

Quizplus · Accepted Answer

The neuraxis runs parallel to the ground in four-legged animals, but in humans it makes an 80-degree turn in the brain, which is called the cephalic flexure. This turn aligns the neuraxis with the upright posture of humans. Therefore, option C is the correct choice.

The Neuraxis Runs in a Straight Line