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प्रश्न
Describe the structure of nephrons.
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उत्तर
Nephrons are the basic filtering units of kidneys. Each kidney possesses a large number of nephrons, approximately 1-1.5 million. The main components of the nephron are the glomerulus, Bowman’s capsule, and a long renal tubule.

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संबंधित प्रश्न
_____________ secreted by the (ii) _____________ lobe of the pituitary gland. If this hormone secretion is reduced, there is an increased production of urine. This disorder is called (iii) ____________. Sometimes excess glucose is passed with urine due to hyposecretion of another hormone called (iv) _____________ leading to the cause of a disease called (v) ______________.
State the exact location of the Loop of Henle.
Blood in the renal artery or renal vein (Which one has more urea ?)
Where is the dirty blood in our body filtered?
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
Put a tick mark (✓) against the most appropriate alternative in the following statement :
In human beings, urea is produced in :
Answer the following in detail.
Explain the process of transpiration. Describe some factors that affect it.
Given below is a set of five terms. Rewrite the terms in their correct order so as to be in logical sequence.
Renal artery, urethra, ureter, kidney, urinary bladder.
Given below is a simplified diagram of the human kidney cut open longitudinally. Answer the questions that follow.
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- Define excretion.
- Why does the cortex of the kidney show a dotted appearance?
- Why does the medulla of the kidney show a striped appearance?
- Write two differences in the composition of the blood flowing through the blood vessels 'A' and 'B'.
Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
Explain in your own words with suitable examples.
How does excretion occur in human beings?
Study the diagram given alongside and then answer the question that follow:

What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Give Technical Term:
The organ which filters out urea and uric acid from the bloodstream.
Write the functional activity of the following structure: Vasopressin
Choose the Odd One Out:
Choose the correct option.
Deproteinised plasma is not found in ______.
Hypotonic filtrate is formed in _______.
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.

The statement given below is false. Rewrite the correct form of the statement by changing the underlined word.
The pigment urochrome is the breakdown product of the haemoglobin of dead RBCs.

