The signal molecule produced by one animal that may affect the behavior of another animal of the same species is the ________.
Fill in the blank(s) with the appropriate word(s).
pheromone or ectohormone
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Which of the following is true regarding the production of intestinal juice?
A) Most of the fluid is actively transported into the lumen. B) The pancreas is the source for most of the intestinal juice. C) Intestinal juice is produced following activation by motilin. D) Local reflexes and parasympathetic stimulation increase the production of intestinal juice. E) The cephalic phase of gastric secretion produces intestinal juice.
At intervals, DNA coiled around histones forms complexes called ________; these complexes may also coil around other histones.
Fill in the blank(s) with the appropriate word(s).
The ________ carries blood to and from the gas exchange surfaces of the lungs.
Fill in the blank(s) with the appropriate word(s).
A hemoglobin molecule contains ________ globular protein subunits
A) 1 alpha and 1 beta B) 2 alpha and 2 beta C) 2 alpha and 3 beta D) 4 alpha E) 4 beta