BIO 3302 Lecture 17: Lecture 17

• School: University of Ottawa
• Department: Biology
• Course: BIO 3302
• Professor: Kathleen Gilmour

Document Summary

Lecture 17 guest le(cid:272)ture & uri(cid:374)e for(cid:373)atio(cid:374) (cid:894)(cid:272)o(cid:374)t"d(cid:895) Neuroendocrine control of ionic uptake in larval zebrafish, danio rerio. Fw fish li(cid:448)e i(cid:374) a dilute e(cid:374)(cid:448)iro(cid:374)(cid:373)e(cid:374)t (si(cid:374)(cid:272)e it"s filled (cid:449)ith high le(cid:448)els of salts a(cid:374)d ions) It will lose salts through diffusion; it can maintain ionic balance because they take up na, cl, and. Ca through active transport from water using atp across the gills. There are many hormones responsible for maintaining ion balance in fish: hormones that increase ion uptake=prolactin, cortisol, isotocin, vit. d, angiotensin, pth. Catecholamines (via beta receptors: hormones that decrease ion uptake=stanniocalcin, catecholamines (via alpha receptors, gaseous neurotransmitters (h2s, co, and no) also impact ion balance, catecholamines are neural hormones secreted from adrenal tissues. Its 3 types include: adrenaline, noradrenaline, and dopamine: cortisol interacts with the diffusive loss of sodium; catecholamines interacts with the uptake of sodium. Ion transporting cells in larval fish are located on a flat sheet (or epithelium) called the (cid:862)yolk sac(cid:863)