Tag: evs

Questions Related to evs

Which of the following are excretory products in animals?

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Urea

  2. Uric acid

  3. Ammonia

  4. All of the above

Show answer
Correct Option: D
Explanation:

In animals, the main excretory products are, Ammonia- protozoans, crustaceans, platyhelminths, cnidarians, poriferans, echinoderms, fishes, larvae/tadpoles of amphibians are ammonotelic. Urea -cartilaginous fish, few bony fishes, adult amphibians and mammals including humans are uricotelic, Uric acid-terrestrial arthropods (including insects), lizards, snakes, and birds are uricotelic.

So, the correct answer is 'All the above'

The process of filtering the blood by artificial kidney is known as

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Dialysis

  2. Excretion

  3. Secretion

  4. Assimilation

Show answer
Correct Option: A
Explanation:
The process of filtering the blood by the artificial kidney is known as dialysis. It is a method of removing excess water, nitrogenous wastes (urea), toxins from the blood in the patient who is rapidly developing loss of kidney function. It is also called renal replacement therapy.
So, the correct answer is 'Dialysis'.

The urinary opening is known as

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Urinary bladder

  2. Ureter

  3. Urethera

  4. None of the above

Show answer
Correct Option: C
Explanation:
The urinary opening is known as Urethra. It is a long tube which connects urinary bladder to the urinary meatus for removal of urine from the body. In males, urethra travels through the penis and meet the urethral meatus located at the tip of the penis. In females, urethra connects to the urethral meatus above the vagina.
So, the correct answer is 'Urethra'.

The major excretory product in humans is 

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Urea

  2. Ammonia

  3. Uric acid

  4. All of the above

Show answer
Correct Option: A
Explanation:
The major excretory product in humans is urea. The first step in the conversion of amino acids from protein into metabolic waste in the liver is the removal of the alpha-amino nitrogen, which results in ammonia. Because ammonia is toxic, it is converted into urea by humans. The urea is excreted in urine by the kidneys.
So, the correct answer is 'Urea'.

The excretory product in fishes are 

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Ammonia

  2. Uric acid

  3. Urea

  4. All of the above

Show answer
Correct Option: A
Explanation:
The excretory product in fishes is ammonia. Usually, food for fish is rich in proteins. And the end product of protein catabolism is ammonia. So fishes excrete ammonia. As the fishes excrete ammonia as excretory waste they are called ammonotelic.
So, the correct answer is 'Ammonia'.

Which of the following is not an accessory excretory organ of vertebrates?

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Skin

  2. Lungs

  3. Liver

  4. Heart

Show answer
Correct Option: D
Explanation:

The heart is a pumping organ. It helps in circulation of deoxygenated blood all through the body. These helps in the oxygenation of blood. It is mainly located in the thoracic region. The waste materials present in the blood is filtered by the kidney.

So, the correct answer is option D.

The 'Urinary System' of the human body consists of how many organs?

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. 4

  2. 3

  3. 2

  4. 5

Show answer
Correct Option: A
Explanation:

The Urinary System, also known as the renal system or Urinary tract, consists of the kidneys, ureters, bladder, and the urethra .

So, the correct option is A. ( 4 )

Which of the following statements is wrong about the human excretory system?

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. Excretory system consists of one pair of bean shaped kidneys, one pair of ureter, a urinary bladder and a urethra

  2. Kidneys are situated between the 12th thoracic and 3rd lumber vertebrae close to the dorsal wall in abdominal cavity

  3. Right kidney is a little higher level than the left one

  4. All

Show answer
Correct Option: A

The ureter transports urine to the urinary bladder

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

True,

Urine passes from the pelvis into the ureter.
Both the ureters open through separate oblique opening into the urinary bladder.
Oblique openings prevent the backflow of urine.

The urethra is surrounded by sphincter muscles.

evs excretion in living organisms other systems in the body excretory system in human human excretory organs

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

True,


Opening of urinary bladder in controlled by sphincters made of circular muscles. These got relax during urine release.

$\bullet$ Two sphincters are present human (inner involuntary,outer voluntary )

$\bullet$ Prostatic urethra is absent in female,  $\therefore$ both sphincters are present in membranous urethra.