41. Type A subjects are more sensitive to stress and produce more catecholamines than type B subjects. 42. Abdominal extra-adrenal paraganglionic cells secrete catecholamines that play an important role in fetal development. 43. It is essential in maintaining catecholamine homeostasis and protection against heart failure during early embryonic development. 44. Further work was done in chromaffin cells to investigate catecholamine release from large dense core vesicles. 45. This polymorphism has lower enzyme activity and has been tied to slower breakdown of the catecholamines . 46. Brain catecholamine levels are high, and corticotropin-releasing factor ( CRF ) concentrations are high. 47. It is a benzylpiperidine and phenethylamine derivative which also shares part of its basic structure with catecholamines . 48. Two uptake mechanisms exist for terminating the action of adrenergic catecholamines -uptake 1 and uptake 2. 49. The membrane association may be related to catecholamine packing in vesicles and export through the synaptic membrane. 50. The rigidity is a function of the types of proteins and the quantity of chitin and catecholamines .
