In auricles, systole and diastole respectively last for

1. 0.3 sec and 0.5 sec
2. 0.1 sec and 0.7 sec
3. 0.2 sec and 0.6 sec
4. 0.5 sec and 0.3 sec

Convex lens is used for the correction of long sightedness. Which of the following reasons support this statement?

P. The image of near by object falls behind the retina.

Q. The lens is too flat resulting in hypermetropia.

R. Uneven curvature of cornea.

1. Only R
2. Only Q
3. Only P and R
4. Only P and Q

A small tablet of potassium permanganate is placed into a beaker filled with water. After some time the water colour changes into pink. Which of the following process is responsible for the above change?

1. Exosmosis
2. Diffusion
3. Osmosis
4. Endosmosis

Proximal denotes the portion of the tubule attached to

1. glomerular capsule
2. collecting duct
3. artery
4. nephron