A lumbar puncture is done by inserting a needle into the O a. dural sinus.
b. arachnoid villus.
c. Central canal.
d. subarachnoid space.

Are needed by the body in large amounts in order to maintain good health

What are hormones? a. they are minerals needed for proper bone formation. b. they are the parts of the body targeted by endocrine glands. c. they are substances needed for muscle and nerve activity. d. they are substances released by endocrine glands.

The amount of oxygen that is actually used by the body during the rest or a hand workout is determined by the heart rate, the stroke volume, and the amount of a. blood circulating in the vascular system b. oxygen removed from the vascular system c. oxygen provided to the vascular system d. blood that individual has in the body e. hemoglobin in the red blood cells