After a person recovers from the chickenpox, the virus can lie dormant in the dorsal root ganglion in multiple levels of the spinal cord and cranial nerves. Later in life, the virus can be reactivated and cause shingles. Why is a reactivated varicella-zoster virus (VZV) infection so painful?

Which statement describes a way in which the digestive and excretory systems work together? a. the nephrons absorb nutrients from food going to the large intestine. b. the excretory system balances blood gases in the small intestine. c. the intestinal villi filter blood and send wastes to the bladder. d. the excretory system balances the salts and water obtained from digested food