[PHGY 209] - Midterm Exam Guide - Everything you need to know! (13 pages long)

• School: McGill University
• Department: Physiology
• Course: PHGY 209
• Professor: Ann Wechsler

Document Summary

Study guide: lecture 2 body fluids. If you have more muscle than fat, you would have more water than someone who has a lot of fat. Amount of adipose tissue (fat) is main factor in determining body water percentage: if body water content is computed as lean body mass (i. e. excluding the fat), the differences b/w individuals become insignificant, water content decreases with age. Also, females have less water content (from puberty on; due to female sex hormones resulting in higher body fat percentage). At infant stage, both male and female have same water content. Physiological reference individual: 21 years old, white male, 70kg: for any given individual, must make adjustments for age, gender, weight, ethnic origin. Body water remains constant in health dynamic steady state . Obligatory vs. facultative losses: obligatory losses: ~1. 5l water / day (1. 0l insensible, 0. 5l urine/stool, facultative losses: vary with intake (loss thru urine.