HSC 2100 Lecture Notes - Lecture 42: Osmoregulation, Plant Cell, Passive Transport
Document Summary
Solution that has a higher solute and lower water concentration relative to another solution. Causes animal cells to become shrivelled and plant cells to become plasmolyzed. Occurs when cell is placed in a hypertonic solution. Maintenance of ideal salt and water concentrations in cells to prevent cell damage and allow all metabolic functions to occur normally. Need for waste removal in the internal biological environment. Different waste products impact the body in different ways. Some waste products such as co2 or ammonia can affect the ph of cell, which can prevent metabolic reactions as enzyme activity is affected. Some waste products are toxic in large concentrations thus must consistently be removed from the body. Presence of dissolved waste can alter the osmotic pressure of a cell, thus excessive waste solutes may caused a cell to become lysed. Fresh water fish continually release ammonia into the aquatic environment via their gills.
