How many kidneys do we have?

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Chapter 1 Organ Systems
Evaluation | Q I. 3. | Page 108

Ascending limb of Henle’s loop is ______ to water, whereas the descending limb is ______to it.

A healthy adult human excretes (on an average) _______ gm of urea/day.

The given diagram represents a nephron and its blood supply. Study the diagram and answer the following question :

Label parts 1, 2, 3 and 4.

With the help of a labelled diagram describe human excretory system.
How will you identify acute kidney injury by urine analysis?

Think of the following: Tears, sweat, saliva, milk, Insulin, urine.
What are these excretion or secretion ? Why ?

Name the Following
The muscle which controls urination.

Which is reabsorbed in selective reabsoiption?

Arrange the following statements in the correct order in which they occur during the formation and removal of urine in human beings.

Ureters carry urine to the urinary bladder.
Wastes dissolved in water are filtered out as urine in the kidneys.
Urine stored in the urinary bladder is passed out through the urinary opening at the end of the urethra.
Blood containing useful and harmful substances reaches the kidneys for filtration.
Useful substances are absorbed back into the blood.

The maximum amount of electrolytes and water (70-80%) from the glomerular filtrate is reabsorbed in which part of the nephron.

Urethral external sphincter present between urinary bladder and urethra is made up of ______ muscles, and is ______ in nature.