Cardio Lecture 16 March 3'11

Cardio Lecture 16 March 3'11 - BISC 220 General Biology...

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BISC 220 General Biology Cell Biology and Physiology Instructor for Part 2 Michael Jakowec, PhD mjakowec@surgery.usc.edu Lab: MCA-241 (HSC Campus) Office Hours: ? Q & A: Hedco 100 Thursday 2 to 3 pm
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Date Day Lecture No. Topic Mar 3 Thurs 16 Cardiovascular System 1: Heart Mar 8 Tues 17 Cardiovascular System 1: Blood System Mar 10 Thurs 18 Respiration Mar 11 Friday Exam Lectures 9 to 16 Mar 15 and 17 Optional Spring Break (Studying of course) Mar 22 Tues 19 Immunity 1 Mar 24 Thurs 20 Immunity 2 Mar 29 Tues 21 Fluid and electrolytic balance 1 Mar 31 Thurs 22 Fluid and electrolytic balance 1 Apr 5 Tues 23 Endocrine 1 Apr 7 Thurs 24 Endocrine 2 Apr 8 Friday Exam Lectures 17-23 Apr 12 Tues 25 Reproduction 1 Apr14 Thurs 26 Reproduction 2 Apr 19 Tues 27 Nervous System 1 Apr 21 Thurs 28 Nervous System 2 Apr 26 Tues 29 Motor System 1 Apr 28 Thurs 30 Motor System 2 May 10 Exam Lectures 24 -30
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Cardiovascular System Lecture 16 and 17 March 3 and 8, 2011
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Optional Study Guide and Topic Enrichment
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Fig. 42-1 Why is this salamander happy?
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The Biophysical Challenge Diffusion is Adequate only over Short Distances 0 20 40 60 80 100 120 140 160 180 0 0.2 0.4 0.6 0.8 1 Distance (cm) Time (min) Time (Distance)2 100 μ m in 1 sec 1 cm in ~ 3 hr Diffusion of gases is similar to gravity where the rate is proportional to the square of the distance. If you are small: “no problem”. If you are large you must find another method. 10 cm~300 hr
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Different Species have found unique ways to solve gas and nutrient exchange challenges.
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Single-celled Organisms are not “diffusion challenged”
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Fig. 42-2 Circular canal Radial canal Mouth a) The moon jelly Aurelia , a cnidarian The planarian Dugesia , a flatworm (b) Mouth Pharynx 2 mm 5 cm Some multicellular organisms use their environments to solve delivery of nutrients
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Cardio Lecture 16 March 3'11 - BISC 220 General Biology...

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