Biology 3601A/B Lecture Notes - Lecture 7: Salt Gland, Teleost, Sodium Chloride
4 Jan 2019
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Lecture 7 turtle"s salt glands (eating jellyfish: nature is based around taking what we know about physiology and testing the possibilities of what this organism actually does. Nacl: essential to physiological function, mostly looking at the sodium portion. It is a really easy to measure sodium concentration in comparison to chloride: carefully managed because you need all the sodium and chloride in conjunction with water balance. Sodium in particular is driving the cell membrane potential/action potential. It also determines water balance in cells/bodies: terrestrial and freshwater animals are often salt-limited this is unusual in human history. Selection pressure is to retain salt and water (even for us) If maintain iso-osmotic, then low u:p ratio in secretion is ok. This figure here has body mass (x-axis) and measure of glomeruli (y-axis) so how much filtration the kidneys can do. There"s medium to large animals on here. The inference here is that this is because marine animals are ingesting all the saltwater.
