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Biology 12 Chapter 15 Homeostasis - 6
1.
Which one is osmoconformers?
a) Sharks and Rays.
b) All freshwater animals.
c) Marine vertebrates.
d) None.
2.
Which one helps to protect protein molecules against adverse effects of urea in vertebrates?
a) TMAO.
b) ADP.
c) TSH.
d) ATP energy.
3.
What is TRUE about marine fishes?
a) Water enters gill capillaries by osmosis.
b) Very dilute urine.
c) Water leaves gill capillaries by osmosis.
d) Active uptake of Na and Cl ions across gills.
4.
What is TRUE about marine fishes?
a) Concentrated urine.
b) Very dilute urine.
c) Active uptake of Na and Cl ions across gills.
d) Water enters gill capillaries by osmosis.
5.
What is TRUE about marine fishes?
a) Active uptake of Na and Cl ions across gills.
b) Water enters gill capillaries by osmosis.
c) Very dilute urine.
d) Active excretion of Na and Cl ions across gills.
6.
Which salts are removed across gill epithelium?
a) Mg.
b) Ca.
c) Na.
d) None .
7.
Which salts are removed across gill epithelium?
a) None .
b) Mg.
c) Ca.
d) Cl.
8.
Which salts are excreted by kidney?
a) Cl.
b) All .
c) Na.
d) Ca.
9.
Which salts are excreted by kidney?
a) Mg.
b) Cl.
c) All .
d) Na.
10.
What are special glands called which are present in walls of rectum?
a) Ureter.
b) Rectal glands.
c) Ionocytes.
d) Ammonotelic.
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