What causes the pumping action (influx and outflux of water containing nutrients and waste) of the intervertebral discs in adults?
A. blood supply
B. body motion
C. neural activity
D. both A and B
E. all of the above
Answer: B
What causes the pumping action (influx and outflux of water containing nutrients and waste) of the intervertebral discs in adults?
A. blood supply
B. body motion
C. neural activity
D. both A and B
E. all of the above
Answer: B