Draw
a well labeled sectional view of human heart showing the passage of flow of
blood.
Thursday, 25 April 2013
Describe the structure and functioning of nephron in the human body
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Describe the structure
and functioning of nephron in the human body.
(Ans) Nephrons are the filtration
units of kidney. Each kidney has a large no. of nephrons. The process starts
with filteration of urine.
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Cup-shaped
structure associated with capillaries is called Bowmans capsule. This
collects filtered urine. As this urine flows through the tubular part of
nephron, reabsorption of glucose, amino acids, salts and water take place.
The amount of water and other substances reabsorbed depends upon how in
excess they are present in the body.The urine formed enters into a long tube
called ureter through the collecting ducts of kidney. Then urine is collected
in urinary bladder.
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How does the process of nutrition take place in amoeba
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(Q.75) How does the process of nutrition take place in amoeba? Explain with the help of labeled figures. (Ans).  |
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Amoeba takes food using finger like extension of cell
surface called pseudopodia. These pseudopodia fuse to form food vacuole. Food
is digested in food vacuole and then diffuses into the cytoplasm. The undigested
food moves on surface and thrown out.
Sketch a flow diagram for the various pathways for breakdown of glucose
Sketch a flow diagram for the various
pathways for breakdown of glucose.
(Ans)
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