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Module 5: Communication, homeostasis and energy
5.1 Communication and homeostasis
5.1.3 Osmoregulation
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Osmoregulation is the control of water
potential
in body fluids.
Osmoregulation is crucial for maintaining
homeostasis
in organisms.
True
Match the environment with the osmoregulatory mechanism used:
Freshwater ↔️ Excrete dilute urine
Marine ↔️ Excrete excess salt
Terrestrial ↔️ Reabsorb water in kidneys
What is one osmoregulatory challenge faced by freshwater animals?
Excess water absorption
What type of urine is produced by terrestrial animals to conserve water?
Concentrated
What is one importance of osmoregulation for cell function?
Proper water balance
Which osmoregulatory mechanism is used by freshwater animals to excrete excess water?
Excrete dilute urine
Marine animals are at risk of
dehydration
due to their environment.
Freshwater animals excrete concentrated urine to conserve water.
False
Excretory systems regulate water and salt balance to maintain
homeostasis
.
Excretory systems help maintain
homeostasis
Osmoregulation maintains a stable internal environment called
homeostasis
Marine organisms drink seawater to conserve water.
True
Freshwater fish excrete dilute urine to remove excess
water
Which marine organism uses salt glands to remove excess salt?
Sharks
Order the importance of osmoregulation for organisms:
1️⃣ Ensures proper cell function
2️⃣ Supports efficient metabolism
3️⃣ Maintains homeostasis
4️⃣ Enhances survival in diverse environments
What is the primary osmoregulatory mechanism in marine organisms?
Excreting concentrated urine
What term describes the process by which organisms maintain water and salt balance to thrive in their environment?
Homeostasis
What is the primary risk faced by marine organisms in osmoregulation?
Dehydration
Match the environment with its osmoregulatory challenge:
Freshwater ↔️ Tendency to absorb excess water
Marine ↔️ Risk of dehydration
Terrestrial ↔️ Water loss via evaporation
What role do excretory systems play in osmoregulation?
Maintain water and salt balance
The excretory systems ensure organisms can thrive in diverse conditions by maintaining proper
fluid balance
and removing waste products.
True
Why is effective osmoregulation crucial for water balance in organisms?
Maintains homeostasis
Organisms adapt to environmental changes to maintain
homeostasis
Match the environment with its osmoregulatory mechanism:
Freshwater ↔️ Excrete dilute urine
Marine ↔️ Excrete concentrated urine
Terrestrial ↔️ Reabsorb water in kidneys
Efficient metabolic processes depend on maintaining optimal water
potential
Efficient metabolic processes depend on optimal water
potential
What does effective osmoregulation enhance in organisms?
Ability to thrive in diverse environments
What water balance challenge do marine animals face?
Risk of dehydration
What is the role of excretory systems in osmoregulation?
Maintain water and salt balance
Osmoregulation is essential for maintaining
homeostasis
and proper cell function.
True
What type of urine do freshwater fish excrete to maintain water balance?
Dilute urine
What do freshwater organisms excrete to remove excess water?
Dilute urine
How do marine fish excrete excess salt?
Specialized salt glands
Terrestrial organisms excrete
concentrated urine
to minimize water loss.
Marine fish like sharks excrete
concentrated
urine and salt through specialized glands.
True
What type of urine do freshwater fish excrete?
Dilute urine
What environmental factors affect osmoregulation?
Water availability, salt concentration, temperature
Marine organisms enhance their salt excretion mechanisms when environmental salinity
increases
.
Environmental adaptations in osmoregulation allow
organisms
to maintain internal stability despite external changes.
True
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