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Excretory Products and their Elimination Test 35

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Excretory Products and their Elimination Test 35
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  • Question 1
    1 / -0
    Which of the following are not ureotelic?
    Solution
    The animals which excrete uric acid as an excretory product are called as uricotelic animals. For example, terrestrial arthropods (including insects), lizards, snakes, and birds are uricotelic. Hence birds /snake are not ureotelic.
    So, the correct answer is 'Birds/Snake'.
  • Question 2
    1 / -0
    Part of nephron that opens into collecting duct is 
    Solution
    The nephron is the structural and functional unit of the kidney. Its body is divided into renal corpuscle, proximal convoluted tubule (PCT), Henle's loop and distal convoluted tubule (DCT). The distal convoluted tubules of many nephrons open into a straight tube called collecting duct. Hence DCT is a part of the nephron that opens into collecting duct.
    So, the correct answer is 'DCT'.
  • Question 3
    1 / -0
    Which is correct
    Solution
    The epithelial cells of Bowman’s capsule called podocytes are arranged in an intricate manner so as to leave some minute spaces called filtration slits or slit pores. Blood is filtered so finely through these membranes.
    So, the correct answer is 'Podocytes - create minute spaces (slit pores) for filtration'.
  • Question 4
    1 / -0
    Urine is formed from
    Solution
    Urine is the liquid waste product of the human body. It contains urea, uric acid, salts, water and other waste products that are the result of various metabolic processes occurring in the body. It is formed in the primary excretory organs- the kidneys. The structural and functional unit of the kidneys is called the nephrons. Millions of nephrons are involved in the process of urine formation. The formation process occurs in 3 steps or phases:-
    • Glomerular Filtration
    • Tubular Reabsorption
    • Tubular Secretion.
    So, the correct option is ' Option A, B and C'.
  • Question 5
    1 / -0
    Hypertonic urine formation is a characteristic of kidneys of
    Solution
    Hypertonic urine formation is a characteristic of kidneys of birds and mammals because of the following phenomenon. The flow of filtrate in the two limbs of Henle’s loop is in opposite directions and thus forms a counter current. The flow of blood through the two limbs of vasa recta is also in a countercurrent pattern. The proximity between the Henle’s loop and vasa recta, as well as the countercurrent in them, help in the formation of hypertonic urine.
    So, the correct answer is 'Birds and mammals'.
  • Question 6
    1 / -0
    Ketone bodies consist of
    Solution
    Ketone bodies are byproducts in the metabolism of fat. During starvation or fasting conditions the liver synthesizes glucose through a process called gluconeogenesis. Gluconeogenesis is a metabolic pathway that results in the generation of glucose from fat. During gluconeogenesis, the ketone bodies are formed as byproducts where the product is glucose. The Kerone bodies consist of acetoacetic acid, acetone and beta-hydroxybutyric acid.
    So, the correct answer is 'Acetoacetic acid, acetone and beta-hydroxybutyric acid'.
  • Question 7
    1 / -0
    What is common between humans and adult Frog
    Solution
    The common feature between humans and the adult frog is Ureotelism. Both human and adult frog excrete urea as excretory waste hence ureotelic.
    So, the correct answer is 'Ureotelic excretion'.
  • Question 8
    1 / -0
    Which of the following is correctly categorised?
    Solution
    The animals which excrete ammonia as the chief excretory nitrogenous waste are called as ammonotelic. For example, aquatic amphibia are ammonotelic.
    The animals which excrete urea as chief excretory nitrogenous waste are called as ureotelic. For example, frog, humans are ureotelic. The animals which excrete uric acid as chief excretory nitrogenous waste are called as uricotelic. For example, pigeons, lizards, cockroach are uricotelic.
    So, the correct answer is ' Ammonotelic : Aquatic amphibia, Ureotelic : Frog, Humans, Uricotelic : Pigeon, Lizards, Cockroach'.
  • Question 9
    1 / -0
    In which part uriniferous tubule, $$Na^+$$ passes out
    Solution
    The nephron is the structural and functional unit of the kidney. It is also called as uriniferous tubule. During the process of urine formation in nephron certain substances are secreted (passes out) and some are reabsorbed along the length of the nephron. The ascending loop of Henle is impermeable to water but allows transport of electrolytes like  Na(+). ions actively or passively.
    So, the correct answer is 'Option C'
  • Question 10
    1 / -0
    Which of the following statement, is false?
    Solution

    Correct Option: A

    Explanation:

    • The most toxic waste is ammonia.
    • Urea is lesser toxic than ammonia.
    • The ammonia s converted into urea in the liver

    Hence, the false statement is urea is more toxic than ammonia.


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