Excretory Products and their Elimination Test - 6

Adrenaline has no effect on glomerular filtration rate.

Overall the osmolarity of the blood decreases when concentrated urine is being produced as water not salt is being reabsorbed in the distal tubules which reside in the cortex.

Glomerular filtrate is free of proteins because large molecules such as proteins are too large to pass through the blood capillary walls.

Principal Cells are involved in water and sodium resorption but secrete potassium.

In Diuresis, the secretion of urine takes place in large quantities.

This is the correct option. Earthworms and African toads are dual excretion animals. Earthworms excrete ammonia when sufficient water is available and excrete urea in drier surroundings. African toads excrete ammonia while in water and excrete urea while they lie immobile in moist air or mud during summer.

This is the correct option. Carbon dioxide is mainly expelled out by the lungs and some through sweat and defecation.

This option is correct. The urinary bladder lies in the pelvic cavity, is somewhat pear-shaped, muscular, sac-like structure and has an inner lining of transitional epithelium.

This is the correct option. Proximal convoluted tubule is lined by cuboidal epithelial cells bearing a brush border of tall microvilli at free end.

The epithelium has cells which are of peculiar shape and are called podocytes (foot cells). The podocytes are so called because they possess foot-like processes, the pedicels.