con-

mamm/o

sigmoid/o

-ary

-ary

chondr/o

Macula densa cells of the juxtaglomerular apparatus monitor the concentration of:

Fetal hemoglobin differs from adult hemoglobin in this way:

Fifty percent of this is recycled and plays an important role in creating the hyperosmotic environment in the renal medulla:

In the micturition reflex, parasympathetic input to the bladder causes the detrusor muscle to relax and internal urethral sphincter to contract