UNC-Chapel Hill BIOL 252 - Urinary System Part 2 (4 pages)

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Urinary System Part 2

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Urinary System Part 2


Urine Production

Lecture number:
Lecture Note
University of North Carolina at Chapel Hill
Biol 252 - Fundamentals of Human Anatomy and Physiology

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BIOL 252 1st Edition Lecture 22 Outline of Last Lecture I How significant is pulmonary elasticity II Ventilation III Resistance to Airflow IV Respiratory Volumes V Restrictive Pulmonary Disorders VI Obstructive Pulmonary Disorders VII Gas exchange VIII Gas transport IX Urinary System X Kidney Function XI Nitrogenous Wastes XII Nephron Outline of Current Lecture I Steps in Urine Formation II Renal Corpuscle III Regulation of Glomerular Filtration IV Proximal Convoluted Tubule Tubular reabsorption Current Lecture I II Steps in Urine Formation a Glomerular filtration creates plasmalike filtrate of blood b Tubular reabsorption removes useful solutes from filtrate returns them to blood i Tubular secretion removes additional wastes from blood adds them to filtrate c Water conservation removes water from urine and returns it to blood concentrates wastes Renal Corpuscle a Glomerulus and Bowman s capsule comprise renal corpuscle b Podocytes because they have feet interdigitate with neighbors i Make narrow slit called a filtration slit ii If something goes from capsular space to blood will have to go through filtration slits c Capsular space where filtrate goes These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute III d Physiology i Filtration w out reabsorption ii Blood hydrostatic pressure 60 out pressure w in capillary iii Colloid osmotic pressure 32 in pressure due to high osmolarity of blood due to proteins proteins in blood osmosis water tends to go into capsular space iv Capsular pressure 18 in pressure within the glomerular capsule 1 Due to confined space v NET filtration pressure 10 mm Hg pushing in outward direction pushes fluid through tubule system e Importance of NFP i Determines flow ii Glomerular filtration rate volume of filtrate over time 1 Typical male 180 L day iii How is NFP related to GFR 1 If one goes up the other goes up 2 Proportional iv How can we lower

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