CHAPTER OUTLINE
T h e U rinary S y s te m P lays a Vital R ole in M aintain ing
H o m e o s ta s is
4 38
T h e K idneys Do th e M a jo r W o rk o f th e U rin a ry S ystem
T h e K id ney Is a C o m p le x Filter
U rin e F o rm atio n Involves T h re e Processes and Helps
M a in ta in th e B lood's V o lu m e and C o m p o stio n
G lo m e ru la r F iltration M o ves a Large A m o u n t o f Fluid
into th e G lo m e ru la r C apsule
R eab so rp tio n and S ecretio n O ccur A lo n g th e Length
o f th e Renal Tubule
T h e N e p h ro n Loop C o n trib u tes to W a te r C o n servatio n
in th e B ody
T h e U rinary B ladd er S to r e s U rine an d E xp els It from th e
B o d y
4 50
T h e U rin a ry B lad d er Is a T e m p o rary S to rag e A rea
U reth ral S tru ctu re V aries B etw een th e S exes
U rin atio n Is a S p in al Reflex
T h e K idneys R egu late th e C o m p o sitio n of B od y Fluids
453
Fluid Balance D epends P rim arily on Electrolyte Balance
W a te r R egu lation Involves a B alance o f Intake and
Loss
W ater Levels Also Depend on Changes in NaCl Levels
H o w Do K id ney S to nes Form ?
T h e K id n eys H elp M aintain th e A c id -B a se B alan ce of B o d y
Fluids
4 58
B uffers H elp to M a in ta in pH Levels W ith in a N a rro w
Range
T h e Lungs and K idneys Can H elp C o m p en sa te fo r
C h an g es in pH
Large C h an g es in pH M a y Result in A cid o sis o r
A lkalosis
■ W h a t a H ealth P rovider Sees: Renal Failure and Dialysis
CHAPTER PLANNER
□ Study the picture and read the opening story.
□ Scan the Learning Objectives in each section:
p. 438 □
p. 450 □
p. 453 □
p. 458 □
Read the text and study all visuals. Answer any questions.
Analyze key features
InSight, pp. 440-441 □
Process Diagram, p. 445 □
p. 448 □
p. 452 □
□ What a Health Provider Sees, p. 462 □
□ Stop: Answer the Concept Checks before you go on:
p. 449 □
p. 452 □
p. 458 □
p. 463 □
End of chapter
Review the Summary and Key Terms.
□ Answer the Critical and Creative Thinking Questions.
□ Answer What is happening in this picture?
Complete the Self-Test and check your answers.
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437
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