Angiotensinogen is a protein produced and secreted by
macula densa cells
endothelial cells (cells lining the blood vessels)
liver cells
liver cells
Major nitrogenous waste product in ureotelic animals like rabbit and other mammals is
uric acid
urea
ammonia
amino acids
Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?
when water is not available camels do not produce urine but store urea in tissues.
Salmon fish excretes lot of stored salt through gill membrane when in fresh water
Paramecium discharges concentrated salt solution by contractile vacuoles
The body fluids of fresh water animals are generally hypotonic to surrounding water