Iodide is transported out of the thyroid cells across the apical membrane into the follicle by a chloride-iodide ion counter- transporter molecule called pendrin.

TLS Online TPP Program

#Id: 6511

#Unit 7. System Physiology – Animal

Rate-limiting step in synthesis of catecholamines:  Tyrosine is converted to dihydroxy-phenylalanine (DOPA) by tyrosine hydroxylase

TLS Online TPP Program

#Id: 6512

#Unit 7. System Physiology – Animal

DOPA is converted to dopamine in the cytoplasm of the cells by DOPA decarboxylase (amino acid decarboxylase)

TLS Online TPP Program

#Id: 6513

#Unit 7. System Physiology – Animal

DOPA is converted to dopamine in the cytoplasm of the cells by DOPA decarboxylase (amino acid decarboxylase)

TLS Online TPP Program

#Id: 6514

#Unit 7. System Physiology – Animal

Dopamine is converted to norepinephrine by dopamine β -hydroxylase

TLS Online TPP Program

#Id: 6515

#Unit 7. System Physiology – Animal

Norepinephrine is the only small-molecule transmitter that is synthesized in synaptic vesicles

TLS Online TPP Program

#Id: 6516

#Unit 7. System Physiology – Animal

Epinephrine is formed by methylation of norepinephrine