Animal Physiology

acetylcholine active adenohypophysis adrenal adrenalin amino acids amount amylase animals aquatic arteries autonomic nervous system bats biology birds blood pressure blood vessels body temperature brain called carbon dioxide causes cent central nervous system chemical contains contraction crab 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 ions juvenile hormone kidney located lungs mammals marine metabolic rate MICHIGAN molt muscle fiber nerve cells nerve fiber nerve impulse neurohypophysis nitrogen normal organs osmotic concentration oxidation oxygen oxygen pressure pancreas pepsin Physiology plasma processes produce protein regulation released respiration respiratory role salt secretin secretion sensitive sensory sodium solution spinal cord stimulation stomach structure substances sugar surface sweat swimbladder thyroid tion tissues tolerance transport tubule urea urine vertebrates vitamin