BIOL 103 Lecture Notes - Lecture 2: Polar Ice Cap, Dead Sea, Cirrhosis
7 Dec 2016
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No pepsin in insects because they have no stomach acid (ph is not low), probable high ph. A few interesting adaptations: salivary glands, active proteases eliminated with feces. Starts digestion before intaking any kind of food uses endoproteases (trypsin and chymotrypsin-like) iclicker question: A polypeptide completely digested with an amino peptidase following product would be (leu-thr-thr-val-ile-arg-val) Ans: leu + thr + thr + val + ile + arg + val. Meaning amino peptidase still contained in the tube with the polypeptide creating separate amino acids. Cows chew their cud because it allows it to mix well with the microbes. Excretion and ion regulation [chapter 46 + 47]: Ammonia = nitrogenous waste product in fish and other aquatic organisms. Sharks get rid of urea or excess salt: They keep urea in their tissues almost isotonic with sea water surrounding the shark. No need to drink sea water little bit of water going through the gills.
