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MSU - BIOL 1144 - Bio II week 12 notes - Class Notes

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MSU - BIOL 1144 - Bio II week 12 notes - Class Notes

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background image BIO 1144 Exam 4 material  3/27/18­3/29/18 I. Urinary system a. Kidney  i. Renal cortex ii. Renal medulla  b. Ureters  c. Urinary bladder 
d. Urethra 
II. Organs of the urinary system  a.           Kidney  i. Forms urine from the blood ii. Urine forming structure: nephron – structural/functional unit of kidneys  b. Ureter  i. Transports urine from kidney to urinary bladder c.           Urinary bladder  i. Stores urine until voided from body  d.           Urethra  i. Conducts urine from bladder during urination  III. The kidney and urine foundations  a. Figure of kidney  IV. Nephron  a. Functional unit of kidney  b. Urine forming unit 
c. ~1 million per kidney 
d. 125 mL blood filtered per minute 
e. 0.75 L blood filtered per hour
f. 18 L blood filtered per day 
g. Total body volume: 5 L
h. Composed of:  i. Renal corpuscle  ii. Renal tubule  V. 3 stages of formation  a. Filtration – glomerulus (capillary bed) / bowman’s capsule  i. Where blood is cleaned ii. Renal corpuscle  b. Reabsorption – proximal tubule (mostly) near Bowman’s c. Secretion – distal tube (mostly) away from Bowman’s 
d. Goals – remove wastes, save goodies, conserve H2O 
VI. Nephron Structure 
background image a. Figure 49.1 VII.  Renal corpuscle  a. Consists of: i. Glomerulus  1. Capillary network 
2. Blood filtered here 
3. Filtered material  a. Glomerular filtrate (GF) b. GF gets pushed to:  i. Bowman’s Capsule  1. Blind ended pouch 
2. Receives GF from glomerulus  
VIII. Renal Tubule  a. Proximal tubule  i. Attached to Bowman’s capsule  b. Lower loop  c. Distal tubule 
d. Collecting duct 
IX. Proximal tube a. Receives GF from Bowman’s  b. Site of Tubular Reabsorption  i. ~60% of GF volume and nearly all glucose, amino acids, and vitamins  reabsorbed here c.           Tubular reabsorption  i. Movement of GF out of renal tubule  ii. Occurs all along length of renal tubule  d. ATP expenditure  X. Proximal tubule  a. Most reabsorption of solutes is by  active transport  i. Low concentration  high concentration (ATP)  b. H2O follows  passively 

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School: Mississippi State University
Department: Biology
Course: Biology II
Professor: Thomas Holder
Term: Spring 2015
Tags: Biology
Name: Bio II week 12 notes
Description: These will be on exam 4.
Uploaded: 04/09/2018
4 Pages 35 Views 28 Unlocks
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