The removal of the waste products of metabolism from the body
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What are the two main excretory products produced by mammals?
Carbon dioxisde and nitrogenous waste from the breakdown of excess amino acids.
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What are the two main functions of the mammilian kidney?
The excretion of urea and the regulation of the water potential of the blood
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What is ammonia?
A small, sokuble and highly toxic substance. It cannot be stored safely and needs large volumes of water to be diluted.
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How do freshwater fish excrete?
Ammonia diffuses out of the gills
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What do mammals excrete?
UREA
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How is producing urea an adaptation to life on land?
It prevents dehydration
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Which animals excrete uric acid?
Reptiles, Birds and insects.
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what is ultrafiltration?
The removal of water and small soluted from the blood.
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What does the basement membrane surrounding the capillary walls of the glomerulus act as?
A molecular filter.
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what are the cells that line the inner layer of the bowmans capsule
podocytes.
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How is the proximal convulted tubule adapted for selective reabsorbtion of solutes?
They possess microvilli to provide a large surface area. They also contain mitochondria for ATP for the active transport of solutes.
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What is the function of the loop of Henle
To conserve water.
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What is homeostasis
The mechanisms that bring about the maintenance of a constant internal environment
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What does a receptor do?
Detects a stimulus
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What does the coordinator do?
Recieves information from the recpetor and initiates the corrective mechanism
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What does the effector do?
Carreis out the corrective procedure and restores the norm.
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what is osmoregulation?
The control of water and solute concentration of the blood
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Describe the Path of ADH when sweating occurs
Low water potential > osmoreceptors in hypothalamus > posterior pituitary gland > increased ADH secretion > increased permeability of distil convuluted tubule and the collecting duct > more water reabsorbed . normal blood water potential
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Other cards in this set
Card 2
Front
What are the two main excretory products produced by mammals?
Back
Carbon dioxisde and nitrogenous waste from the breakdown of excess amino acids.
Card 3
Front
What are the two main functions of the mammilian kidney?
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