Q1 of 48 Page 104

Define the following terms:

Ultrafiltration

The process of the filtration of blood in the glomerulus under great pressure during which the liquid part of the blood i.e. plasma along with urea, glucose, amino acids and other substances enter the renal tubule, is termed as Ultrafiltration.


In a nephron, the blood flows through the glomerulus under great pressure. The reason for this great pressure is that the efferent (outgoing) arteriole is narrower than the afferent arteriole (incoming). This high pressure causes the liquid part of the blood to filter out from the glomerulus into the renal capsule.


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9

Match the items in Column I with those in Column II and write down the matching pairs.























Column I



Column II



(a) Bowman’s capsule



(i) Renal artery



(b) Contains more CO2 and less urea



(ii) Regulates amount of water excreted



(c) Antidiuretic hormone



(iii) Renal vein



(d) Contains more urea



(iv) Glomerculus


 10

Fill in the blanks in the following passage to make it a meaningful description.

In a nephron, the ____ flows through the ____ under great pressure. The reason for this great pressure is that the ____ (outgoing) ____ is narrower than the ____ (incoming). This high pressure causes the ____ part of the blood to filter out from the ____ into the ____ capsule.

 1

Define the following terms:

Micturition

 1

Define the following terms:

Renal pelvis