BISC 101 Lecture Notes - Lecture 16: Animal Nutrition, Isoleucine, Valine

• School: Simon Fraser University
• Department: Biological Sciences
• Course: BISC 101
• Professor: Tony Williams

Document Summary

Animal nutrition involves food (energy/nutrients) being taken i (ingested), taken apart (digested) a(cid:374)d take(cid:374) up (cid:894)a(cid:271)sor(cid:271)ed(cid:895) + (cid:449)hat"s left is got rid of (cid:894)e(cid:454)(cid:272)reted(cid:895) Food provides chemical energy (for atp synthesis(, raw materials for biosynthesis of complex molecules and essential nutrients. Co(cid:373)ple(cid:454), (cid:862)li(cid:374)ear(cid:863), tu(cid:271)e-like, digestive systems allow for specialization of function to increase digestive efficiency. All animals must eat; but food intake must be balanced with nutrient and energy demand daily or seasonally = homeostasis. Failure to match intake and demand, or failure to eat the correct foods/nutrients, can lead to health problems (e. g. obesity) Four steps in obtaining nutrients and then eliminating waste. Digestion: breakdown of food into smaller pieces. Substrate feeders: live in or on their food source fluid feeders: suck nutrient-rich fluid from a living host suspension feeders: sift small food particles from water. Bulk feeders: ingest relatively large pieces of food adaptations for capturing food (ingestion) carnivores: large pointed canines; jagged premolars and molars.