Biol 204 Lab Midterm - Lab 1 Upper respiratory tract -nose...

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Lab 1 Upper respiratory tract -nose -nasal cavity -pharynx Lower respiratory tract -larynx -trachea -bronchial tree, lungs -Epiglottis= closes to keep food and liquid from entering the trachea Thoracic cavity Lungs which are enclosed in the pleural membrane Parietal- outer Visceral- inner -Air flows into the alveolar ducts, and then into the alveolar sacs, which are groups of alveoli Respiratory membrane contains: -pulmonary surfactant= lowers surface tension of the lungs - alveolar epithelium= squamous epithelial -thin interstitial space between the alveolar and pulmonary capillary Histology Nasal cavity= pseudostratified ciliated columnar Transitional space= simple cubodial Oropharynx= stratified squamous -Muco-ciliary escalator= ciliated epithelium serves to sweep inhaled particles out -PAMs- also assist in the removal -Diaphragm- most important muscle of inspiration
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Breathing is designed to: -control CO 2 -maintain oxygen levels to support oxidative phosphorylation Lab 2 Mean Blood Pressure= total peripheral resistance x cardiac output Four Factors That Determine Blood Pressure -cardiac output= stroke volume x heart rate -total peripheral resistance -capacity of the venous system -volume of fluid in the circulatory system -viscosity Changes During Exercise -Stimulation of the sympathetic system leads to the following Heart rate, force of contraction, stroke volume and cardiac output all INCREASE -Stroke volume= end-diastolic volume – end-systolic volume Metabolic Changes During Exercise -Anaerobic= glycolysis -Aerobic= oxidative phosphorylation, Krebs cycle, Pyruvate to acetyl-CoA Oxygen Deficit -conversion of accumulated lactate back to glucose in the liver -replenishing the muscle ATP and creatine phosphate stores -replenishing the oxygen content of the muscle myoglobin (found in muscle tissue) Lab 3 Cell Communication
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-Endocrine= occurs when the cell release their chemical messenger into the blood stream -Paracrine= message is diffused to neighbor cells -Autocrine= communication with oneself Intracellular receptors for lipid-soluble hormones: -steroid and thyroid hormones are lipid soluble, and diffuse easily across the cell membrane -once inside they bind with special hormone receptor proteins and enter the nucleus where they
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This note was uploaded on 11/17/2010 for the course BIOL 333 taught by Professor Walter during the Spring '10 term at Purdue University-West Lafayette.

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Biol 204 Lab Midterm - Lab 1 Upper respiratory tract -nose...

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