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Life Processes Test - 63

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Life Processes Test - 63
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  • Question 1
    1 / -0
    Blood is purified by:
    Solution
    The kidneys in excretory system acts as filtering unit. They are capable of filtering one-quarter of the blood that is output by the heart. 
    This blood is sent to the body's filter treatment plant, where it is purified by the kidneys and circulated on to the rest of the body. 
    So, the correct answer is option A.
  • Question 2
    1 / -0
    Autotrophs can be differentiated from the heterotrophs in terms of the:
  • Question 3
    1 / -0
    The currency of energy in a typical living cell is
    Solution
    Various metabolic processes in our body utilize ATP as a source of energy. It is considered as the energy currency of cells as it stores the chemical energy of food molecules to be utilized as and when required by the body.
    So, the correct answer is option A. 
  • Question 4
    1 / -0
    The food passes through
    Solution
    During digestion process fist food is ingested by mouth where chewing churning and mixing of food take place and make semi solid paste of food called as a bolus. Bolus then enters into the oesophagus where food moves through peristaltic movement and enters into the stomach. Thus, the correct answer is option C.
  • Question 5
    1 / -0
    Digestive system has _________ muscles.
  • Question 6
    1 / -0
    Transpiration is a useful process as it is involved in 
    Solution
    Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere. Transpiration is essentially evaporation of water from plant leaves. Translocation is not involved in food translocation and growth and curvature of plants.
    Therefore, the correct answer is option C.
  • Question 7
    1 / -0
    What percent of your blood is plasma?
    Solution
    • Plasma is the largest component of your blood, making up about 55 per cent of its overall content. 
    • When isolated on its own, blood plasma is a light yellow liquid, similar to the colour of straw. Along with water, plasma carries salts and enzymes.
    So the correct option is B
  • Question 8
    1 / -0
    Major excretory nitrogenous waste in humans is
    Solution
    • Animals mostly excrete excess nitrogen as ammonia, urea, or uric acid produced during protein metabolism.
    • Ammonia is the direct waste produced as a byproduct of protein metabolism by all animals.  
    • Because of its toxicity, many animals convert ammonia into a less toxic form. 
    • Any conversion of ammonia into other forms comes at a price, for animals must expend cellular energy (ATP) to convert ammonia to either form of nitrogenous waste.
    • The major excretory product in humans is urea. 
    • Because we secrete urea as the primary nitrogenous waste product, we are called ureotelic animals.  
    • The urea is excreted in urine by the kidneys.
    • Birds and reptiles have evolved the ability to convert toxic ammonia into uric acid i.e. they are uricotelic.

    So, the correct answer is 'Urea'.
  • Question 9
    1 / -0
    A child breathes nearly:
    Solution
    Children breathe faster than adults. Body size, weight, and activity level influence normal breathing rates. Age is most commonly used to determine normal values. normal breathing rate ranges from as high as 30-60 breaths per minute at birth to as low as 12-16 breaths per minute at the age of 18.
    The infants from birth to one year should have 30-60 breaths per minute. Toddlers, ages, 1-3 breathe 24-40 times per minute. Preschoolers, ages 3-6 years, average 22 to 34 breaths per minute. 6-12-year-olds have 18-30 breaths per minute.
    Therefore, the correct answer is option B.
  • Question 10
    1 / -0
    In a closed circulatory system, blood is completely enclosed within the:
    Solution
    The closed circulatory system is where the blood flows into specialized blood vessels such as arteries, veins and capillaries. In the closed circulatory system, the blood never comes out in direct contact with the tissues. For example, human being, dogs, rat, etc.
    So, the correct answer is option C.
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