Question 1:

Given: The data for water exchange in a 24-hr period:
IN = 2.1 L of water consumed in food and drinks.
OUT_KIDNEY = 1.5 L of water lost in urine
OUT_SWEAT = 0.1 L of water lost
OUT_BREATH = 0.35 L of water lost
OUT_FECES = 0.4 L of water lost
OUT_TEARS = 0.05 L of water lost

a) Estimate the fraction of water (as a percentage) that leaves your body per day in urine, feces, sweat, tears, and expired air.

b) Write down the mass balance equation for the above exchange

c) How much water is generated by your body

Question 2:

A sink is operating with the following steady-state conditions: the volume of the sink is 5 L, and water infused with dye is flowing into and out of the sink at a steady rate of 0.3 L/min. The concentration of dye in the tank is 20g/L. If the dye moleculesupply is suddenly stopped,

a) Write the equation for the concentration of dye molecule in the sink as a function of time.

b) What is the concentration of dye in the solution at t=τ

Question 3:

Describe the major parts of the digestive system.