Question

Indicate whether the following statements are true or false
(a)Micturition is carried out by a reflex.
(b)ADH helps in water elimination, making the urine hypotonic.
(c)Protein free fluid is filtered from blood plasma into the Bowmans Capsule.
(d)Henles loop plays an important role in concentrating the urine.
(e)Glucose is actively reabsorbed in the proximal convoluted tubule.

Answer 1

A. Micturition is carried out by a reflex : The stimuli for this reflex is the extension of bladder due to increased volume of urine. The parasympathetic nervous system takes part in this.

So the given statement is true.

B. ADH is an antidiuretic hormone released from posterior pituitary. It helps in reabsorption of water and Na+ from the urinary filtrate and decrease the amount of urine released. As a result the urine may be hypertonic.

So the given statement is false.

C. The filtration membrane of the glomeruli continue minute pores that doesnt allow proteins to pass trough that filtration membrane. As a result the filtered fluid from blood plasma is protein free.

So the given statement is true.

D. Henles loop helps in reabsorption of water and nacl. The network of blood vessels namely Vasa recta surround the loop of henley and participate in counter current mechanism. Thus concentrating the urine.

So the correct statement is true.

E. Glucose upto 70-80% is reabsorbed in PCT by means of Na+-glucose pump. This is a secondary active transport.

So the given statement is true.