Most laxatives (except saline laxatives) may be used to provide relief: 1  during pregnancy. 2  for a few days after giving birth. 3  during preparation for examination or surgery.  for constipation of bedfast 1  patients. for constipation caused by other medicines.  following surgery when straining should be avoided.
Grasslands of BC :: Ecosystems. Energy Flow. Refer to the yellow arrows in the diagram to help you understand the way that energy moves through an ecosystem. Energy enters an ecosystem in the form of heat from the sun. This energy is absorbed by organisms such as plants, and is then converted to other forms of energy and stored. Once stored, energy is used for necessary life functions, such as growth, movement and reproduction.
1 Energy is continually input into an ecosystem in the form of light energy, and some energy is lost with each transfer to a higher trophic level. 2  Nutrients, on the other hand, are recycled within an ecosystem, and their supply normally limits biological activity. 3  So, energy flows, elements cycle.he study of ecosystems mainly consists of the study of certain processes that link the living, or biotic, components to the non-living, or abiotic, components. Energy transformations and biogeochemical cycling are the main processes that comprise the field of ecosystem ecology.