Self Studies
Self Studies
Self Studies
Self Studies

Excretory Products and their Elimination Test 8

Result Self Studies

Excretory Products and their Elimination Test 8
  • 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
    The mechanism of uric acid excretion in a nephron is
    Solution
    The pressure of the blood inside the glomerulus is increased due to the difference in diameter of the incoming and outgoing arterioles. This increased blood pressure helps to force most of the water, salts, glucose and urea of the blood out of the glomerular capillaries. This is the process of ultrafiltration. Tubular secretion removes excessive quantities of certain dissolved substances from the body, and also maintains the blood at a normal healthy pH. The substances that are secreted into the tubular fluid for removal from the body include potassium ions ($$K^+$$), hydrogen ions ($$H^+$$), ammonium ions ($$NH_4^+$$), creatinine, uric acid, some hormones and some drugs (e.g. penicillin). Hence the actual process which excretes out uric acid is through tubular secretion. So, the correct answer is option C.
  • Question 2
    1 / -0
    $$Na^{+}$$ secreting from the kidney are highly affected by the hormone
    Solution
    ADH lowers the osmolarity (reducing sodium concentration) by increasing water reabsorption in the kidneys. To prevent osmolarity from decreasing below normal, the kidneys have a regulated mechanism for reabsorbing sodium in the distal nephron. This mechanism is controlled by aldosterone, a steroid hormone produced by the adrenal cortex. When the osmolarity increases above normal, aldosterone secretion is inhibited. The lack of aldosterone causes less sodium to be reabsorbed in the distal tubule.
  • Question 3
    1 / -0
    Podocytes are the cells present in?
    Solution

    Correct Option: B

    Explanation:

    • Podocytes, also known as foot cells, are specialized cells with a unique shape that surround the glomerulus in the epithelial visceral inner layer of Bowman's capsule.
    • The pedicers have foot-like appendages or extensions. As a result, they're known as foot cells.
    • Squamous epithelium cells make up the outer wall of Bowman's capsule.

    Hence, podocytes are present in the inner walls of the bowman’s capsule.

  • Question 4
    1 / -0
    Glomerulus is formed by ______________.
    Solution
    Glomerulus is formed by the incoming or afferent renal arteriole that further branches into a tuft of capillaries in the cavity of the Bowman's capsule and, exits as efferent arteriole. The glomerulus and the Bowman's capsule together form the Malphigian body. 
    So, the correct answerr is 'Branch from renal artery'
  • Question 5
    1 / -0
    Assertion: Earthworms excrete both ammonia and urea.
    Reason: Excretion in earthworm depends on the environment.
    Solution
    Earthworms excrete ammonia when sufficient water is available, because a large volume of water is needed by the animal to dissolve ammonia and eliminate it from, the body. Whereas in drier environment the animal eliminates urea as it requires only considerable amount of water for the excretion of urea because urea is very soluble in water.
  • Question 6
    1 / -0
    Which one of the following is not a part of a renal pyramid?
    Solution
    Proximal and distal convoluted tubules lie in the cortex and loop of Henle lies in the medulla. The collecting duct system begins in the renal cortex and extends deep into the medulla. These help in the maintaining the concentration of urine. These are not a part of the renal pyramid.
    So, the correct answer is option C.
  • Question 7
    1 / -0
    Which the following processes takes place in the figure given below?

    Solution
    The given diagram represents the Bowman's capsule present in the kidney that does the function of renal filtration also called glomerular filtration. It is the first step in urine formation where blood is filtered under high pressure. Thus the correct answer is option B.

  • Question 8
    1 / -0
    In the Venn diagram given below, which excretory
    products are represented correctly by R, S and T?

    Solution
    R depicts the carbon dioxide. This gas is evolved by cells during cellular respiration and is carried to the lungs. From the lungs it is released into outer atmosphere through the nose.
    S depicts water. Excess water is eliminated by the kidneys. This helps in maintaining homeostasis. Also some water is eliminated during respiration process of the lungs along with carbon dioxide,
    T depicts urea and mineral salts that are also excreted by the kidneys with the help of nephrons by a series of steps. 
    Thus the correct answer is option  B.
  • Question 9
    1 / -0
    Which one of the following characteristics is common both in humans and adult frogs?
    Solution
    So, the correct answer is 'Ureotelic mode of excretion'.

  • Question 10
    1 / -0
    The filtration units of kidney are called ____________.
    Solution
    Hint: Every living organism generates waste in its body and has a mechanism to expel it. In humans, the excretory system eliminates waste as urine.

    Part 1: Definition - Human Excretory System
    • In humans, the excretory system takes care of waste generation and elimination.
    • It comprises of the following structures:
      2 Kidneys
      2 Ureters
      1 Urinary bladder
      1 Urethra

    Part 2 - Role of the kidney in urine formation
    • Kidneys are the primary organ of the human excretory system.
    • The kidneys remove waste products called urea along with extra water and ions from the blood to form urine through tiny filtering units called nephrons. 
    • The nephron is the functional unit of a kidney. 
    • Each kidney consists of millions of nephrons.

    Part 3 - Structure of nephron
    • All nephrons function together to filter blood and expel waste products. 
    • A nephron consists of the following parts:
     Bowman’s capsule -  It is the first part of the nephron. Glomerular filtration occurs here.
     Proximal Convoluted Tubule - Water and reusable materials from the blood are now reabsorbed back into it.
     The loop of Henle - Urine becomes concentrated in this area.
     Distal Convoluted Tubule and Collecting Duct - Here the kidney hormones cause their effect.
    • The collecting ducts together form the renal pelvis. Through the renal pelvis, the urine passes into the ureter and then into the bladder.

    Part 4 - Conclusion
    • From the above discussion, we can conclude that urine is filtered and concentrated in nephrons and then collected to excrete out of the body.

    Final step: The filtration units of kidney are called as nephrons.
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