Parts of Respiratory System

Parts of Respiratory System - o can be overridden...

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

View Full Document Right Arrow Icon
Parts of Respiratory System breathing structures - visceral pleural membrane - covers outside of each lung parietal pleural membrane - covers inner wall of thoracic cavity pleural cavity - space between parietal/visceral membranes o filled w/ fluid, makes the 2 membranes stick together diaphragm - along w/ external intercostals muscles, changes thoracic volume to breathe o contract >> expands rib cage to inhale o relax >> unforced exhalation tidal volume - amount of air moved w/ each breath o anatomical dead space - areas where no exchange of air takes place vital capacity - maximum amount of air that is exhaled o reduced in emphysema, due to damaged alveoli hypoventilating >> not enough breathing to maintain normal blood gas hyperventilating >> too much breathing breathing regulation - controlled by respiratory control center in medulla oblongata automatic control of skeletal muscles in diaphragm and external intercostals muscles
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o can be overridden voluntarily • oxygen, carbon dioxide concentrations change pH >> central/peripheral chemoreceptors in brain o peripheral chemoreceptors - control immediate breathing changes o central chemoreceptors - control sustained breathing changes • dyspnea - difficulty in breathing o due to something blocking the airways • apnea - temporary pause in breathing hemoglobin- protein made up of 4 polypeptides, 4 heme groups • iron atom at center of each heme group, can bind to oxygen • hemoglobin w/ oxygen = oxyhemoglobin o bright red color • hemoglobin releases oxygen >> deoxyhemoglobin o dark red color, but changes tissue to blue color • hemocyanin - found in invertebrates in place of hemoglobin o has copper instead of iron • carbon monoxide poisoning - CO displaces O2 >> hypoxia (hemoglobin can’t carry oxygen)...
View Full Document

This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

Ask a homework question - tutors are online