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

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

Which cell organelle is known as suicidal bag
(1) Ribosome (2) Centrosome (3) Lysosome (4) Peroxysome

Break down of pyruvate to give carbon dioxide, water and energy takes place in
(1) Cytoplasm (2) Mitochondria (3) Chloroplast (4) Nucleus

The correct pathway of blood in circulatory system is

(1) Auricles -> Ventricles -> Arteries -> Veins
(2) Ventricles -> Auricles -> Veins -> Arteries
(3) Ventricles -> Veins -> Arteries -> Auricles
(4) Veins -> Ventricles -> Arteries -> Auricles

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

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