Animal Physiology

acetylcholine active adenohypophysis adrenal adrenalin amino acids amount aquatic arteries autonomic nervous system bats biology birds blood pressure blood vessels body temperature brain called capillary wall carbon dioxide causes cent central nervous system chemical contains contraction crab curve decreases diffuse digestion dissolved drink sea water effect electric endocrine energy enzymes evaporation excrete fish fluid formed fresh-water function gills gland glucose grams heart heat hemoglobin hibernation higher hormone increase insects intestine invertebrates juvenile hormone kidney located lungs mammals marine metabolic rate molt muscle fiber nerve cells nerve fiber nerve impulse neurohypophysis nitrogen normal organs osmotic concentration oxidation oxygen oxygen pressure pancreas Physiology plasma processes produce protein regulation released respiration respiratory role salt secretin secretion sense sensitive sensory sodium solution spinal cord stimulation stomach structure sugar surface sweat swimbladder thyroid tion tissues tolerance transport tubule urea uric acid urine vertebrates vitamin