In parasympathetic nervous system, which of the following is released?
Epinephrine
Norepinephrine
Serotonin
Acetylcholine
D.
Acetylcholine
Autonomic Nervous System (ANS) automatically regulates the activities of smooth, cardiac muscles and glands. This coordination is involuntary. It is of two types:
(i) Sympathetic ANS : It shows sympathy, ie, increases the function and expenditure of energy takes place. Preganglionic nerve secretes acetylcholine and post-ganglionic nerve secretes sympathetin.
(ii) Parasympathetic ANS : It provides relaxation, comfort, pleasure at the time of rest and conservation of energy takes palce. Post- ganglionic nerve secretes acetylcholine.
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Ca2+ and Mg2+ ions
Mg2+ ions
Fe2+ ions
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
The velocity of conduction of nerve impulse in frog is
300 m/s
same as of electricity
faster than sound
30 m/s
Entamoeba histolytica differs from Amoeba in absence of
pseudopodia
contractile vacuole
nucleus
ectoplasm
