Lecture 1: Breathing

Question 1

Ventilation

Answer 1

movement of gas from environment to has exchange space driven by a pressure gradient: product of breathing frequency and tidal volume

Question 2

Laws of partual pressure

Answer 2

total pressure of a gas is the sum of partial pressures of gasses present
ptot= p1+p2+p3…

Question 3

Daltons Law

Answer 3

partial pressure of gas found by knowing total pressure and fractional concentration of indivdiual gas species; dry gas partial pressure
Px= ptot * F

Question 4

water vapor correction

Answer 4

noise moistens air such that 100% is saturated at trachea, thus PO2 must be corrected
pH20= 47mm Hg @ 37 degrees celcious

Question 5

henrys law

Answer 5

volume of as dissolved in liquid is proportional to partial pressure

Question 6

ficks law of diffusion

Answer 6

rate that molocules move through membrane to reach equal concentrations; deal a alot with area and thickness change

Question 7

atmosheric pressire at sea level is

Answer 7

760 mm Hg