we're so close. let's bi 121 lecture 17 shine on the exam! i. … · 2014-12-02 ·...
TRANSCRIPT
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We're so close. Let's shine on the exam!BI 121 Lecture 17
I. Announcements Exam II Monday Dec 8th
@ 8:00 am! 12 n lab section report to 129 HUE,1 pm lab section 130 HUE. All others here!Discussion-Review, this Thursday, here in 100 WIL!
II.Respiratory Physiology Connections LS ch 12, DC m7+A. How do we breathe? LS fig 12-12, fig 12-25 pp 349-356,
pp 373-378B. Gas exchange LS fig 12-4, fig 12-19 pp 362-5C. Gas transport LS fig 11-2 p 299, tab 12-3 pp 365-70D. What happens in a gunshot wound or impalement
injury? Pulmonay membranes? Pneumothorax?LS fig 12-5, 12-6, 12-8, 12-9, pp 349-52
III.Physiology of Cigarette Smoking LS + DC + ACS +…A. ANS, autonomic nerves & nicotine? Chemical route B. Emphysema? 2nd-hand smoke?... LS p 356, 365C. UO Smoke-Free since Fall 2012! Help is available!
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LS 2012 fig 12-25
Brain stem ≡ Control Center for automatic
breathing!
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Respiratory membraneseparates air from blood, is 6 layers, yet 1/50th
thickness of tracing paper!
LS 2012 fig 12-4a
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Alveoli are surrounded by jackets of capillaries!
LS 2012 fig 12-4b
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O2 HIGH
O2 LOWCO2 HIGH
CO2 LOW
cf: LS 2012 fig 12-19
Gas Exchange
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O2 is carried mainly by red blood cell hemoglobin!
LS 2012 fig 11-2
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LS 2006, cf: LS 2012 tab 12-3
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Visceral Pleura
Parietal Pleura
Pleura/Peritonea/Lung Membranes
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cf: LS 2012 fig 12-5
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cf: LS 2012 fig 12-6, 12-8
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cf: LS 2012 fig 12-9
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http://www.nlm.nih.gov/medlineplus/ency/presentations/100150_2.htm
Pneumothorax ≡ Air enters intrapleural space
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http://easypediatrics.com/treatment-of-pneumothorax
X-ray of patient with pneumothorax
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http://www.ukmsc.com.my/?p=478
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American Cancer Society Great American Smoke Out!
http://www.cancer.org/healthy/stayawayfromtobacco/greatamericansmokeout/
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Cigarette Smoking: #1 Preventable Cause of Premature Death in the US
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Not only the Lungs, but the Heart, Brain & 100s of Other Tissues & Organs Adversely Affected!
Tobacco smoke = Deadly mix of > 7000 chemicals!
http://www.cdc.gov/tobacco/data_statistics/sgr/2010/consumer_booklet/chemicals_smoke/
http://www.cdc.gov/tobacco/data_statistics/sgr/50th-anniversary/index.htm#fact-sheets
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UO's Josh BuehlerU.S. Surgeon General
Regina Benjamin
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Ach
= Nicotinic Receptor= Muscarinic Receptor
Ach = Acetylcholine
Ach
Parasympathetic
Ach
NE = Norepinephrine = α Receptor (α1 , α2)= β Receptor (β1 , β2)
/
Sympathetic
NE
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Cigarettes ≡ Patient-Assisted Drug-Delivery SystemInhaling Bypasses the Systemic Circulation
& Is Powerfully Reinforcing!
Pulmonary
Systemic
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Tracing the Route of Cigarette SmokePuff to Brain Time 5 to 8 seconds!!
Mouth
Pharynx
Trachea
Larynx
Bronchi
Bronchioles
Alveoli
Blood
Pulmonary Veins
Left Ventricle
Aorta
Heart
BrainSystemic Circulation
Left Atrium
RespiratoryMembrane
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Recreation?Recreation?Recreation?Relaxation?Relaxation?Relaxation?
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Cigarette smoking is the most important
preventable cause of premature death in the
U.S. accounting for 443,000 annual deaths.
Keep it Basic?
http://www.cdc.gov/tobacco/data_statistics/fact_sheets/health_effects/tobacco_related_mortality/#cigs
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DC 2013 fig 7-7 p 57
We know about lung cancer, but what about…?
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Cigarette smoking causes 87% of lung cancer deaths and is responsible for most cancers of the larynx, oral cavity & pharynx, esophagus, & bladder
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Macho Man?
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Emphysema Emphysema ≡≡ Corrosion of Alveolar Corrosion of Alveolar Walls with Walls with ↓↓ SA & Labored BreathingSA & Labored Breathing
Internet Journal of Pathology Internet Journal of Pathology Mayo Clinic HealthMayo Clinic Health
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CT Densitovolumetry in Heavy Smoker with Emphysema Indicating ~ 22% Compromise of Lung Parenchyma
SOURCE: Corrêa da Silva, 2001, from Emphysema Imaging Ali Nawaz Khan
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http://www.realityunfiltered.com/
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Increased Risk of:
1. Blood Clots
2. Heart Attack
3. Strokes!
On the Pill & Smoke?
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Breathing 2nd-hand smoke for as little as
½ hr activates platelets almost as
much as if you were a pack-a-day smoker
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2nd-hand smoke is the 3rd leading preventable cause of death in the US!
Each year ~45,000 Americans die due to 2nd-hand smoke exposure!
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https://www.sciencenews.org/article/health-risks-e-cigarettes-emerge
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+ =
SMOKING ≡ ASTHMA?
Petri-dishEffect
Ugh!!Cough! Cough!!
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freebase nicotine!!
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To be buried with sunflowers? Compost?
Cigarettes & 2Cigarettes & 2ndnd--hand smoke!!hand smoke!!
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…Thanks for helping us for well over 15 yr!!
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http://www.cancer.org/healthy/stayawayfromtobacco/guidetoquittingsmoking/guide-to-quitting-smoking-help-phys-nrt
Nicotine Addiction & Help Quitting Smoking
http://www.cancer.org/cancer/cancercauses/tobaccocancer/secondhand-smoke
2nd-Hand Smoke or ETS & 3rd-Hand Smoke?
http://www.ncbi.nlm.nih.gov/pubmed?term=2nd%20hand%20smoke%20addictive
2nd-Hand Smoke Addictive?
http://www.ncbi.nlm.nih.gov/pubmed/21840504http://www.ncbi.nlm.nih.gov/pubmed/19936715http://www.ncbi.nlm.nih.gov/pubmed/20211642
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