Sea gulls excrete excess of NaCl from
liver
lungs
nasal activity
kidney
C.
nasal activity
Sea gulls have salt glands which excrete large loads of salt taken with their food and with the water they drink. Sea water contains 3% salt which is three times saltier than a bird's body fluid.
Salt glands are located above each eye and consists of several lobes arranged parallely. Salts are secreted into many radially arranged tubules then flows into a central canal that leads into the nose.
Which compound has a very important role in prebiotic evolution?
Sulphur dioxide
Nitric oxide
Methane
Sulphur trioxide
Which one is component of Ornithine cycle?
Ornithine, citrulline and alanine
Ornithine, citrulline and arginine
Amino acids are not used
Ornithine, citrulline and fumaric acid
Entamoeba histolytica differs from Amoeba in absence of
pseudopodia
contractile vacuole
nucleus
ectoplasm
The velocity of conduction of nerve impulse in frog is
300 m/s
same as of electricity
faster than sound
30 m/s
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Ca2+ and Mg2+ ions
Mg2+ ions
Fe2+ ions
In parasympathetic nervous system, which of the following is released?
Epinephrine
Norepinephrine
Serotonin
Acetylcholine
