In which one of the following organism, its excretory organs are correctly stated?
Humans- Kidneys, sebaceous glands and tear glands
Earthworm -Pharyngeal, integumentary and septal nephridia
Cockroach - Malpighian tubules and enteric caeca
Cockroach - Malpighian tubules and enteric caeca
B.
Earthworm -Pharyngeal, integumentary and septal nephridia
In earthworm, the excretory system is made up of many segmentally arranged microscopic coiled tubes called nephridia. These are ectodermal in origin and analogous to the vertebrate kidney.
In Pheretima, following three types of nephridia are seen.
(i) Pharyngeal nephridia - Situated on either side of pharynx and oesophagus in 4, 5 and 6 segments.
(ii) Integumentary nephridia - Scattered in the body wall, seen from 7th segment onwards
(iii) Septal nephridia - Largest nephridia attached to both faces of each intersegment septum behind 15th segment
In which one of the following preparations are you likely to come across cell junctions most frequently?
Ciliated epithelium.
Thrombocytes
Tendon
Tendon
Uric acid is the chief nitrogenous component of the excretory products of
man
earthworm
cockroach
cockroach
Which one of the following is the true description of an animal concerned?
Earthworm - The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine.
Frog - Body divisible into three regions- head, neck and trunk
Rat - Left kidney is slightly higher in position that the right one
Rat - Left kidney is slightly higher in position that the right one
The kind of epithelium which forms the inner walls of blood vessels is
cuboidal epithelium
columnar epithelium
ciliated columnar epithelium
ciliated columnar epithelium
The cell junctions called tight, adhering and gap junctions are found in
muscular tissue
connective tissue
epithelial tissue
epithelial tissue
The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is
cuboidal
glandular
ciliated
ciliated
If a live earthworm is pricked with a needle on its outer surface without damaging its gut, the fluid that comes out is
excretory fluid
coelomic fluid
haemolymph
haemolymph
Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
Thorn of Bougainvillea and tendrils of Cucurbita - Analogous organs
Nictitating membrane and blind spot in human eye - Vestigial organs
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
Nephridia of earthworm and Malpighian tubules of cockroach - Excretory organs
If for some reason our goblet cells are non -functional, this will adversely effect
Production of somatostatin
secretion of sebum from the sebaceous glands
maturation of sperms
maturation of sperms
