Which chemical is produced during vigorous exercise when the supply of oxygen to a muscle is limited or inadequate?

Which statement about the pancreas is not true? a. it is an endocrine organ in the abdomen. b. it release chemicals into the digestive system. c. it releases insulin to increase glucose levels. d. it release hormones into the bloodstream.

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.