Self Studies
Self Studies
Self Studies
Self Studies

Excretory Products and their Elimination Test 12

Result Self Studies

Excretory Products and their Elimination Test 12
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is the correct combination?

    Solution
    The mammalian urinary system consists of the kidneys, the urinary bladder, and associated ducts. Each kidney is covered by a connective tissue renal capsule. The outer portion of the kidney is the renal cortex (Label B) the inner portion is the renal medulla (Label C). The renal medulla contains 8 to 10 cone-shaped structures called renal pyramids. The tip of each pyramid is a renal papilla. Each papilla has several pores, the openings of collecting ducts. As urine is produced, it flows from collecting ducts through a renal papilla and into the renal pelvis (Label D), a funnel-shaped chamber. Urine then flows into one of the paired ureters (Label E), ducts that connect each kidney to the urinary bladder. Each kidney has more than 1 million functional units called nephrons (Label A). A nephron consists of a cuplike Bowmans capsule connected to a long, partially coiled renal tubule.
    So, the correct answer is option A.
  • Question 2
    1 / -0
    Which of the following statements is incorrect?
    Solution
    Nephrons form hypotonic urine when we drink a large amount of water and hypertonic urine when we drink less water. Nephron needs t regulate the concentration of water and salts which are excreted in order to regulate the blood volume and its concentration. When we drink a large amount of water ADH is not secreted, causing the release of a large amount of urine which hypotonic. When we intake less amount of water, ADH secretion increases and it leads to conservation of water in the body making urine hypertonic.
    Thus, the correct answer is option B. 
  • Question 3
    1 / -0
    Kidney stones are crystals of 
    Solution
    A kidney stone, also known as a renal calculus or nephrolith, is a calculus formed in the kidneys from minerals in the urine. Kidney stones typically leave the body by passage in the urine stream, and many stones are formed and passed without causing symptoms. If stones grow to sufficient size (usually at least 3 millimeters (0.12 in)) they can cause blockage of the ureter. This leads to pain, most commonly beginning in the flank or lower back and often radiating to the groin or genitals. Calcium is one component of the most common type of human kidney stones, calcium oxalate. 
    So, the correct answer is 'Calcium oxalate'
  • Question 4
    1 / -0
    The graph shows the enzymatic activity needed for excretion of urea. The graph depicts mode of excretion of frog which has changed from ............. to ........ in adult.

    Solution
    In aquatic animals ammonia is the main nitrogenous waste; and only about 10% of nitrogenous wastes are excreted as urea. Most amphibians are at least semi aquatic, and their mechanisms of osmoregulation are similar to those of freshwater fishes. They, too, produce large amounts of dilute urine. In its urine and through its skin, a frog can lose an amount of water equivalent to one third of its body weight in one day. Active transport of salt inward by special cells in the skin compensates for loss of salt through skin and in urine. In larval stage or tadpole stage frog excretes ammonia ie it is ammonotelic animal but a adult frog is terrestrial and changes to ureotelism ie excretes urea.
  • Question 5
    1 / -0
    Blood fraction remaining unchanged after circulation through kidney is
    Solution
    Blood fraction of glucose and protein remain unchanged after circulation through kidney because firstly, glomeruli does not allow the protein to come in ultra-filtrate from blood capillaries, due to their large molecular size, secondly, the glucose which is present in the ultrafiltrate is reabsorbed by active transport into the blood capillaries.
    Urea and uric acid fraction after circulation through kidney changes because they are not reabsorbed and are excreted out through urine.
    So, the correct answer is option D.
  • Question 6
    1 / -0
    Which one is the correct option for the structure and function of a nephron?
    Solution
    Urine formation involves three main processes namely, glomerular filtration, reabsorption and secretion, that takes place in different parts of the nephron. The first step in urine formation is the filtration of blood, which is carried out by the glomerulus and is called glomerular filtration. Proximal convoluted tubule (PCT) is lined by simple cuboidal brush border epithelium, which increases the surface area for reabsorption. Nearly all of the essential nutrients and 70-80 percent of electrolytes and water are reabsorbed by this segment. In Distal Convoluted Tubule (DCT), conditional reabsorption of sodium and water takes place. DCT is also capable of selective secretion of hydrogen and potassium ions.
  • Question 7
    1 / -0
    Ammonia is excretory material in
    Solution
    Aquatic animals usually excrete ammonia directly into the external environment, as this compound has high solubility and there is more water available for dilution.
  • Question 8
    1 / -0
    In kidney glomerulus is involved in 
    Solution
    The first step in urine formation is the filtration of blood, which is carried out by the glomerulus and is called glomerular filtration. On an average, 1100-1200 ml of blood is filtered by the kidneys per minute, which constitute roughly 1/5th of the blood pumped out by each ventricle of the heart in a minute. The glomerular capillary blood pressure causes filtration of blood through 3 layers, i.e., the endothelium of glomerular blood vessels, the epithelium of Bowman's capsule and a basement membrane between these two layers. 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, that almost all the constituents of the plasma except the proteins pass onto the lumen of the Bowman's capsule. Therefore, it is considered as a process of ultrafiltration.
    So, the correct answer is option C.
  • Question 9
    1 / -0
    Animals which excrete large amount of ammonia are
    Solution
    Aquatic animals usually excrete ammonia directly into the external environment, as this compound has high solubility and there is more water available for dilution.
  • Question 10
    1 / -0
    The blood vessel taking blood into Bowman's capsule is
    Solution
    Blood is delivered to the kidney by the renal artery. The renal artery enters as an afferent arteriole and forms a tuft of capillaries in the Bowmans capsule and comes out as efferent arteriole.
    So, the correct answer is option A.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now