Contractile vacuole in protozoan Amoeba is meant for
respiration
excretion
locomotion
osmoregulation
D.
osmoregulation
Contractile vacuole is the clear rounded, pulsating body present in the posterior part of endoplasm of Amoeba. Found only in fresh water and is concerned by osmoregulation, ie, removal of excess of water.
Plasmalemma is a trilaminar and selectively permeable membrane covering the body functions both in excretion and respiration in Amoeba.
Pseudopodia are finger like and blunt extensions of cell body in protozoans. It is a temporary locomotory structure also used for feeding in Amoeba.
During inspiration, the diaphragm
expands
shows no change
contracts and flattens
relaxes to become dome- shaped
The function of pineal body is to
lighten the skin colours
control sexual behaviour
regulates the period of puberty
All of the above
Which of the following is important for muscle contraction and nerve impulse transmission?
Ca2+ ions
Mg2+ ions
Both (a) and (b)
Fe2+ ions
Which one is component of Ornithine cycle?
Ornithine, citrulline and alanine
Ornithine, citrulline and arginine
Amino acid are not used
Ornithine, citrulline and fumaric acid
The leucocytes contain which of the following in large quantity?
Basophils
Neutrophils
Eosinophils
Monocytes
