IMG_0001_NEW_0018 - capacities. Normal values at rest: =...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
compared to the outside atmospheric pressure ---> air molecules move through the respiratory tubes into the lungs from the atmosphere following the pressure gradient. inspiratory muscles, when they work their hardest, can produce a negative pressrre as great as -30 mm Hg below atmospheric pressure within the alveoli. =,E+F*uti€qt,r- passive process at rest. Secondary muscles, such as abdominal muscles become involved in exercise. Forced expiration can produce intra-alveolar pressure as great as +50 mm Hg above atmospheric pressure. During exercise, mouth breathing tends to replace nasal breathing - less resistance to airflow. Air that enters the respiratory passages via either the nose or the mouth is quickly saturated with water vapor and warmed to body temperature. 37 degrees centigrade, even under conditions when veffi Compliance - the amount of volume change in the lung for a given change in alveolar pressrre. III. Lung Volumes Refer to Lab Manual, pages 17 -4 and 17 -5, for definitions of various lung volumes and
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: capacities. Normal values at rest: = Lfu+idA,{ v4,urw) x(1}ew*h,rvl beatAg pu " wrwu; Tidal volume (Vr) - 500 mL oer insoiration or exniration (* ,,d",ne ,J' % it"tyirtol'or eiytirzol wqh' eol,h bru* 61 rogt * MJ o,ry sbfl'l a,*ivf) Breathing frequency Gil - 12 - 16 breaths per minute l*',wi,*l volung $at 6.1 U' eriou4 +or'$L ,z*ir* er"l-erii lnsoiratorv caoacitv (IC),- anoroximatelv 75'o/o of vital cao"acitv (VC) ' @ ry ( 1fu rrari*A wkEpq4-tl.kt ua be iuyip2l .P + rart ,*( erp;r*ey p*$on) Total lung capacitt'": vital capacity plils residiral volume (atways have air i.rt in lung) --Tt-c = lft *v In maximal aerobic exercise, breathing frequency can increase up to 60 breaths per minute and tidal volume can increase up to 50 % of vital capacity. Minute ventilation Oe ) - 6 - 8 liters/min. Expiratory reserve volume (ERV}- approximately 25Yo of vital capacity lnspiratory capacity (IC)i,- approximately 75'Vo of vital cap-acity (VC) = P JL+ siti"lt) ERV...
View Full Document

This note was uploaded on 12/29/2011 for the course KIN 142 taught by Professor Asmundson during the Fall '09 term at Simon Fraser.

Ask a homework question - tutors are online