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(modified salivary glands) that allow them to excrete excessive salt and thus be more tolerant of saline environments. alligators and caimans have the same structures but they are non-functioning terms of salt excretion and thus have a lower tolerance to salinity. alligators also differ from crocodiles...
. in mammals , including humans, testosterone is primarily synthesized in the testes of males, but small amounts are also secreted by the female ovaries, the placenta, and the adrenal glands of both sexes. because these steroids are lipid soluble, they can diffuse fairly freely from the blood through...
resulting heart block. one of the main actions of the parasympathetic nervous system is to stimulate the m muscarinic receptor in the heart, but atropine inhibits this action. secretions and bronchoconstriction atropine's actions on the parasympathetic nervous system inhibits salivary, sweat, and mucus glands...