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Summary

Homeostasis and the Kidney Summary Sheet

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Homeostasis and the Kidney Summary Sheet

Institution
CCEA
Module
Unit A2 1 - Physiology and Ecosystems








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James Napier Biology for CCEA A2 Level
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  • 9781780731001
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Study Level
A/AS Level
Examinator
CCEA
Subject
Biology
Unit
Unit A2 1 - Physiology and Ecosystems
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Summarized whole book?
No
Which chapters are summarized?
Homeostasis and the kidney
Uploaded on
February 26, 2019
Number of pages
5
Written in
2018/2019
Type
Summary

Subjects

Content preview

Chapter 1:Homeostasis and the Kidney
Homeostasis: The maintenance of constant or steady state conditions within the body

 Control system with sensors for monitoring
 Corrective mechanism
 Negative feedback system
Why?
 provides optimum conditions for enzyme reactions e.g. pH and temp.
 avoids osmotic problems in cells and body fluids

The Kidney

Excretion: removal of the toxic waste of metabolism e.g. urea (nitrogenous waste)

Osmoregulation: control of the water potential of body fluids



Urinary/Excretory System

Cortex: Outer dark region

Medulla: Inner lighter region, number of pyramids that extend
into the pelvis



Structure of the nephron

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