Maximum amount of water from the glomerular filtrate is reabsorbed in

1. PCT
2. descending limbs of loop of Henle
3. ascending limbs of loop of Henle
4. DCT

Harish went to the beach for vacation of 2-3 days. After coming home he noticed his skin tone has darkened. This was due to

1. melanin
2. rhodopsin
3. thyroxine
4. serotonin

Injury to the medulla generally results in death. Which of the following reasons support this statement?

P. It controls the activities of the internal organs.

Q. It control involuntary actions like salivation, vomiting, movement of breathing, beating of the heart.

R. It is the main thinking part of the brain.

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

The external female genitalia is called the

1. hymen
2. uterus
3. vagina
4. vulva