Which one of the following is not a function of the kidney ?

(1) Filtration 
(2) Oxidation 
(3) Absorption 
(4) Secretion

By which cell the process of opening and closing of stomata is controlled?

(1)  Epidermal Cell
(2)  Guard Cell
(3)  Accessory Cell
(4)  Leaf Cell

Kidneys in human beings are a part of t he system of
(1) Nutrition (2) Respiration (3) Excretion (4) Transportation

Which endocrine gland does regulate the level of phosphorus in blood?

(1) Thyroid 
(2) Parathyroid 
(3) Adrenal 
(4) Pituitary

Which one of the following is attached to the right ventricle?

(1) Pulmonary artery 
(2) Pulmonary vein
(3) Superior venacava 
(4) Inferior venacava