When blood pH decreases, the urinary system helps to maintain the extracellular fluid pH by 01.
excreting excess hydrogen ions and reabsorbing bicarbonates
2. synthesizing buffers
03
retaining carbon dioxide in the filtrate
4. excreting filtrate

Answers to mastering biology drag the labels to their appropriate locations to complete the punnett squares for morgan's reciprocal cross. drag blue labels onto the blue targets to indicate the genotypes of the parents and offspring. drag pink labels onto the pink targets to indicate the genetic makeup of the gametes (sperm and egg). labels can be used once, more than once, or not at all. hints