Tag: introduction to excretion

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Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Ciliated funnels found on the ventral side of kidney in Frog are

  1. Ostia

  2. Nephrostomes

  3. Bidders organs

  4. Corpora adiposa
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The excretory system of frog consists of a pair of kidney, ureters, urinary bladder and cloaca. On the ventral surface of the kidney in the frog, there are ciliated funnels present called as nephrostome. The nephrostome is internally lined with cilia, its function is to push water, metabolic wastes and other substances into metanephridium (Kidney).

So, the correct answer is 'Nephrostomes'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Xenopus excretes

  1. Uric acid

  2. Urea

  3. Ammonia

  4. Creatinine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The frogs which are highly aquatic belongs to the genus xenopus. They are usually found in lakes, rivers, swamps. The xenopus excretes ammonia as nitrogenous waste hence ammonotelic.

So, the correct answer is 'Ammonia'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Urinary bladder is absent in

  1. Aves

  2. Reptiles

  3. Amphibians

  4. Mammal
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In mammals, urine is made in the kidneys and travels down through two tubes called ureters to the muscular sac called as urinary bladder. The bladder stores urine, allowing urination to be infrequent and controlled. The urinary bladder is absent in aves because they do not urinate, their excretory waste is excreted as white paste through the cloaca.
So, the correct answer is 'Aves'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Excretory organs of flatworms / Taenia are

  1. Flame cells

  2. Nephridia

  3. Malpighian tubules

  4. Renette glands
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms (except the turbellarian order Acoela), rotifers and nemerteans; these are the simplest animals to have a dedicated excretory system. Flame cells function like a kidney, removing waste materials.
So, the correct option is 'Flame cells'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Kidneys are excretory organs in

  1. All chordates

  2. Mammals only

  3. Mammals and amphibians only

  4. Mammals, reptiles and amphibians only
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

For many chordates, the urinary system is a critical component of the excretory system. It is made up of organs such as the kidneys and bladder, structures such as a urethra or cloaca, and even arteries such as the aorta. The urinary system is responsible for both creating and excreting urine, which it does to regulate the amount of water and solutes within the body. Amazingly enough, the urinary system also works closely with hormones in your body that signal when you start to become dehydrated or when there is too much fluid in your body.

So, the correct option is 'All chordates'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Antennary glands of crustaceans are meant for

  1. Gustatoreception

  2. Olfactoreception

  3. Tangoreception

  4. Excretion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In decapod crustaceans, the excretory organs are known as antennary glands or green glands. These glands are opaque-white, pea seed sized structures, enclosed in the coxa of each second antenna. These glands play an important role in the process of excretion.


So, the correct option is 'Excretion'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Which of the following groups have similar function?

  1. Typhlosole in Earthworm, intestinal villi in Rat and contractile vacuole in Amoeba

  2. Nephridia in Earthworm, malpighian tubules in Cockroach and urinary tubules in Rat

  3. Antennae in Cockroach, tympanum of Frog and clitellum of Earthworm.

  4. Incisors of Rat, gizzard (proventricules ) of Cockroach and tube feet of Starfish
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Earthworms (annelids) have slightly more evolved excretory structures called nephridia. A pair of nephridia is present on each segment of the earthworm. Malpighian tubules are found lining the gut of some species of arthropods, such as the bee. They are usually found in pairs and the number of tubules varies with the species of insect.


So, the correct option is 'Option B'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Consider the following statements
I. Flame cells are excretory structures in flatworms
II. Green glands are excretory organs in annelids
III. Columns of Bertin are a conical projection of renal pelvis into renal medulla between the renal pyramids.

  1. II and III incorrect

  2. I and II correct

  3. I and III correct

  4. I, II and III correct
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
II) Green glands are excretory organs of some arthropods like crustaceans. They are also called antennal glands because these glands are located near the base of larger antennae.
III) Columns of Bertin is the projection of cortex into the renal medulla as renal columns in between the renal pyramids.
So, the correct answer is 'II and III are incorrect'.
Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Green glands present in some arthropods help

  1. Respiration

  2. Excretion

  3. Digestion

  4. Reproduction
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Green glands are excretory organs of some arthropods like crustaceans. They are also called antennal glands because these glands are located near the base of larger antennae. Each gland has three parts end sac, labyrinth and bladder. The labyrinth is the proper excretory gland. Hence green glands help in excretion.

So, the correct answer is 'Excretion'.

Multiple choice evs more about organ system introduction to excretory system structures and functions related to the excretory system introduction to excretion

Antennal gland functions as excretory organ in

  1. Planaria

  2. Prawn

  3. Earthworm

  4. Cockroach
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Green glands are excretory organs of some arthropods like crustaceans.  For example, prawns, crayfishes, lobsters etc. They are also called antennal glands because these glands are located near the base of larger antennae. Each gland has three parts end sac, labyrinth and bladder. The labyrinth is the proper excretory gland. Hence antennal gland functions as the excretory organ in prawn.

So, the correct answer is 'Prawn'.