01:119:116 Lecture Notes - Lecture 11: Contractile Vacuole, Amniotic Sac, Protocell
25 Jul 2017
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Examples of homeostasis: c/c, iov homeostasis in different animals. Homeostasis in animals: c/c, seq homeostasis processes, seq glucose homeostasis. The steady state of equilibrium between internal and external environments. All living things regulate internal conditions Response to stimulus reduces stimulus (ex. sweating, blood sugar) B ultimately inhibits a for weaker response (see fig. Response to stimulus amplifies stimulus (ex. nursing + oxytocin) B ultimately promotes a for stronger response (see fig. Mechanisms depend on environment and type of organism. Living things may need [solute] > or < environment. Purely chemical processes and spontaneous (not a living cell) osmosis and diffusion occur across lipid bilayers. Water can get across bilayer, ions cannot. Leads to a distinct environment inside protocell that was different from environment outside. Dan the man advises grabbing some pond water and seeing them. [solute] in cell > outside environment (hypotonic cell) Causes water to move inward via osmosis: can cause busting.
