Class X

In urinary system of humans, tube which carries urine outside body from urinary bladder is known as
  1. ureter
  2. urethra
  3. urinary bladder
  4. gall bladder
Causes of kidney failures are
  1. hypertonic
  2. diabetes
  3. hypertension
  4. both b and c
In urine formation second step selective re-absorption, descending limb of loop is responsible for
  1. reabsorption of water
  2. reabsorption of salts
  3. reabsorption of white cells
  4. reabsorption of white cells
During day time, by-product of plants is
  1. oxygen
  2. carbon dioxide
  3. nitrogen
  4. hydrogen
In humans, urine is produced when
  1. urethra filters blood
  2. kidneys filter blood
  3. lungs inhale oxygen
  4. lungs exhale CO2
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