Comparative Physiology of Osmoregulation Quiz
Test your knowledge on osmoregulation with questions on fish, mammals, birds, reptiles, and more. Explore how organisms maintain internal balance.
#1
Which organ is primarily responsible for osmoregulation in freshwater fish?
Gills
Kidneys
Intestines
Skin
#2
What is the process by which marine animals maintain proper salt concentrations within their bodies?
Osmosis
Desalination
Salt excretion
Osmoregulation
#3
In which environment would you expect to find a higher concentration of urea in the body fluids of an animal?
Freshwater
Saltwater
Terrestrial
None of the above
#4
Which hormone plays a crucial role in regulating water balance in mammals by increasing water reabsorption in the kidneys?
Insulin
Glucagon
Antidiuretic hormone (ADH)
Aldosterone
#5
Which of the following is a characteristic of osmoconformers?
They maintain constant internal osmolarity regardless of external environment
They adjust their internal osmolarity to match the external environment
They have specialized cells for osmoregulation
They are only found in marine environments
#6
What is the primary function of the rectal gland in elasmobranchs such as sharks and rays?
Water absorption
Salt excretion
Digestion
Gas exchange
#7
Which ion plays a crucial role in the regulation of osmotic balance in plants?
Sodium (Na+)
Chloride (Cl-)
Potassium (K+)
Calcium (Ca2+)
#8
What is the term for the process by which marine birds and reptiles excrete excess salt accumulated from their diets?
Osmoregulation
Urine filtration
Salt excretion
Nephron absorption
#9
Which of the following animals is known for its ability to survive extreme dehydration by entering a state of suspended animation?
Kangaroo rat
Camel
Elephant
Polar bear
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