BIO270H1 Lecture Notes - Diverticulum, Atp Hydrolysis, Glucagon
Document Summary
Assimilation: conversion of nutrients into fluid/solid body substance by digestion and absorption. Ingestion: gain access to environmental chemicals (usually through gi tract) Must meet metabolic demands (dependent on growth rate, body size activity, stress) Net energy: energy available to animals through assimilation. Specific dynamic action: energy reflected in increase of metabolic rate. Most mammals (except us and guinea pigs) get vitamin c from bacteria in gi tract. Accelerated by calbidin protein and controlled by vitamin d. Can be directly absorbed if in heme form. Protein quality: animals have better quality because plant lack some essential aa, eat diversity of plants for best results. Need omega-3 (linolenic from fish) and omega-6 (linoleic from seeds) Lipases: break triglycerides and phospholipids into fatty acids. Down concentration gradient by facilitated diffusion or glut proteins (glucose transporter ) Against concentration gradient by active transport: sodium-depenmdent cotranspoter.
