BIO 3302 Lecture Notes - Lecture 12: Tonicity, Euryhaline, Salt Lake
4 Nov 2017
School
Department
Course
Professor
Document Summary
Lecture 12. 5 - start ion and water balance. Previously mostly talked about oxygen and co2 exchange. Water and ion balance are very important parts of the internal environment. Provides a buffer between the environment and the internal. Keep this constant --> don"t need to maintain inside. Gradients between inside the cell compared to external environment. Maintaining constant internal environment while external environment change vs conforming, matching the environment, matching line of equality. Great for constant over time and compatible with life. Red arrow - sea water, 1000mili sea osmuls. Water and ion loss from feces and urine. Will have a lot of salt and water movement. Obligatory exchange - occurs as a result of physical factors over which the animal has little or no physiological control. Because of chemical and physical laws, driven by environment. Regulated exchanges = physiologically controlled for the maintenance of homeostasis. How much water loss comparison in the same amount of time.
