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Life Processes - 05
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Q.1. Which one of the following does not have valves ?
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veins
heart
capillaries
arteries
Q.2. Coagulation of blood in a cut or wound is brought about by :
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WBC
platelets
plasma
RBC
Q.3. The blood vessel which carries oxygenated blood from the lungs to the heart is :
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pulmonary artery
main artery
pulmonary vein
main vein
Q.4. The instrument for measuring blood pressure is called :
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barometer
potentiometer
manometer
sphygmomanometer
Q.5. The excretory unit in the human excretory system is called :
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nephridia
neuron
kidneyon
nephron
Q.6. The substance which is not reabsorbed into the blood capillaries surrounding the tubule of a nephron is mainly :
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amino acid
glucose
water
urea
Q.7. The procedure of cleaning the blood of a person by using a kidney machine is known as :hydrochloric acid. This is :
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ketolysis
photolysis
hydrolysis
dialysis
Q.8. The cells in our blood which destroy disease-causing germs, are :
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skin cells
RBCs
WBCs
platelets
Q.9. The wave of expansion of an artery when blood is forced into it is called :
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ticking
pulse
flow
heart beat
Q.10. In autotrophs, water is transported through :
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stomata
phloem
root hair
xylem
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