Excreation

Many bony fishes, aquatic amphibians and aquatic insects are___1____in nature. Ammonia, as it is readily___2___ , is generally excreted by diffusion across body surfaces or through gill surfaces (in fish) as ammonium ions.

• ureotelic,

  soluble

• ammonotelic, insoluble

• ammonotelic, soluble

• uricotelic,

  soluble

Reptiles, birds, land snails and insects excrete nitrogenous wastes as uric acid in the form of________.

• concentrated urine

• diluted urine

• liquid

• pellet or paste

Protonephridia or flame cells are the excretory structures in

• all annelids & the cephalochordate.

• Platyhelminthes , rotifers, all annelids & the cephalochordate.

• Platyhelminthes , rotifers, some annelids & the cephalochordate.

• only in platyhelminthes

Protonephridia are primarily concerned:

• glucose concentration

• temperature of body

• homeostasis

• osmoregulation.

Nephridia are the tubular excretory structures of

• mammals

• amphibians

• only in earthworms

• earthworms & other annelids.

Antennal glands or green glands perform the excretory function in_______.

• cockroach

• crustaceans like prawns.

• echinoderms

• annelids

Read the statements and find incorrect statement:

S1: Kidneys are reddish brown

S2: bean shaped structures

S3: situated between the levels of 2nd last thoracic &

4rd lumbar vertebra

• S2 & S3

• only S1

• except S1

• only S3

Each kidney of an adult human measures-

S1: 12-14 cm in length,

S2: 4-5cm in width,

S3: 3-4 cm in thickness

S4: average weight of 120- 170 g

Read the statements and find correct one:

• All except S1

• All except S4

• only S1 & S2

• only S4

Glomerulus alongwith Bowman’s capsule, is called:

• renal corpuscle

• malphighian body

• malpighian body or renal corpuscle

• kidney

Podocytes are

• Endothelial cells of the glomerulus

• Endothelial cells of the Bowman’s capsule

• Epithelial cells of the Bowman’s capsule

• Epithelial cells of the glomerulus