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Life Processes Test - 44

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Life Processes Test - 44
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  • Question 1
    1 / -0
    The wall of the stomach is protected against the action of HCl by:
    Solution
    HCl is produced in the stomach to digest food. HCl is highly acidic. Mucus protects the lining of the stomach from the harsh acidic conditions created by the HCl.
    Hence, the correct answer is option C.
  • Question 2
    1 / -0
    In the given diagram of the excretory system of humans, different parts are indicated by alphabets. Match the alphabets with the parts they represents. 

    Solution
    • The kidneys (A) are bean-shaped organs that receive oxygenated blood from the paired renal arteries for filtration. 
    • The inferior vena cava (B) carries deoxygenated blood from the lower half of the body to the right atrium of the heart. 
    • The ureter (C), which is a tube-like structure, carries urine from the kidney to the urinary bladder. In humans, there are two ureters, one attached to each kidney. 
    • The urinary bladder (D) is a hollow muscular organ that functions as the body's urine storage tank. Urine gets collected in here until excreted out from the body.
    • The urethra (E) is a short tube that connects the urinary bladder to the urinary meatus for the removal of urine from the body. 

    So, the correct answer is option A.
  • Question 3
    1 / -0
    In what condition does a person require artificial kidney?
    Solution
    The correct option is C.
    Only If both kidneys are damaged, an artificial kidney would provide the benefit of continuous blood filtration. It would increase the quality of life for the patients.
  • Question 4
    1 / -0
    Kidney dialysis machine was invented by
    Solution
    Willem J Kolff invented the first practical artificial kidney, which over many years was refined and perfected leading to the hemodialysis machines that are now in regular use world wide. 
    So, the correct answer is option A.
  • Question 5
    1 / -0
    In which of the following organ, maximum absorption of water takes place in humans? 
    Solution
    Kidneys have small filtering units called nephrons. These nephrons filter the blood. Some substances in the initial filtrate, such as glucose, amino acids, salts, and a major amount of water, are selectively reabsorbed into the blood, as the urine flows along the tube. The amount of reabsorption of water depends on the amount of excess fluid in the body. If the body requires more water, maximum reabsorption of water takes place in the nephrons, present in the kidney.
    So, the correct answer is option C. 
  • Question 6
    1 / -0
    Each human kidney has nearly:
    Solution
    In humans, a normal kidney contains 800,000 to 1.5 million nephrons. The nephrons carry out the functions of the kidney and are known as the functional units of a kidney. Nephrons act as filtering units thereby removing the toxic materials from the blood. From the given options, the number which comes the closest to the number of nephrons in a kidney is 1 million.
    So, the correct answer is option D.
  • Question 7
    1 / -0
    The small intestine is structurally different from the stomach due to the presence of:
    Solution
      Digested food is taken up by the walls of the small intestine. The inner lining of the small intestine has numerous finger-like projections called villi which increase the surface area for absorption. The villi are richly supplied with blood vessels that take the absorbed food to each and every cell of the body. 
      So, the correct answer is option B.
    • Question 8
      1 / -0
      The basic functional and structural unit of human kidney is:
      Solution
      The nephron is the basic structural and functional unit of the kidney. It is a microscopic structure that regulates water and soluble substances in the blood by filtering the blood, reabsorbing what is needed, and excreting the rest as urine. Hence, helps in urine formation.
      A neuron is the fundamental unit of the nervous system.
      Nephridia are organs of excretion in some invertebrates.
      The malpighian tubule is the excretory organ of insects,
      So, the correct answer is option A.
    • Question 9
      1 / -0
      Mode of nutrition in Amoeba is: - 
      Solution
      • The mode of nutrition in Amoeba is known as holozoic nutrition. It involves the ingestion, digestion, and egestion of food material with the help of pseudopodia. 
      • Pseudopodia acts as an organ for locomotion or taking in food from its surroundings.
      So the correct answer is (D).
    • Question 10
      1 / -0

      In an accident, a man dies immediately although there was no injury to the brain, kidney, stomach, and heart, The probable cause of death maybe

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