Excretory System

Question 1

What kind of unwanted waste is eliminated from body in excretory system?

Answer 1

Nitrogenous waste

Question 2

Ammonotelic excretory system. Substance? Animals?

Answer 2

Ammonia as main substance. Aquatic animals are ammonotelic

Question 3

Uroletic excretory system. Animals? Substance?

Answer 3

All mammals. Urea.

Question 4

Uricoletic excretory system. Substance? Animals?

Answer 4

Uric acid. Birds and reptiles.

Question 5

What are the three types of excretory systems in animals?

Answer 5

Ammonetic ammonia aquatic
Ureotelic urea mammals
Uricotelic uric acid birds and reptiles

Question 6

Order of toxicity of different substances of excretory systems?

Answer 6

Ammonia > urea > uric acid

Question 7

What is the main excretory organ in humans

Answer 7

Kidneys

Question 8

Draw nephron

Answer 8

Ban gaya dhang se?

Question 9

Where are kidneys located in human

Answer 9

A pair of kidneys is located on the posterior side of abdominal cavity on the both sides of vertebral column

Question 10

A kidney is made up of several Functional units they are called

Answer 10

Nephrons

Question 11

What is the cup shaped bag found in the upper portion of the nephron

Answer 11

Bowmans capsule

Question 12

What does a Bowmans capsule consist of

Answer 12

Afferent arterioles and efferent arterioles

Question 13

What are afferent arterioles?

Answer 13

Take info from body towards central excretory system

Question 14

What are efferent arterioles

Answer 14

Takes info from central system to body

Question 15

The two arterioles in bowmans capsule from what?

Answer 15

Glomerulus

Question 16

Where does ultrafiltration happen in kidneys?

Answer 16

Glomerulus

Question 17

Function of glomerulus?

Answer 17

Ultrafiltration. Excess impurities in body are filtered here

Question 18

Path of filtrate from bowman’s capsule to collecting duct?

Answer 18

Bowman’s capsule
PCT
Henle’s loop (via descending limb)
Then DCT (via ascending limb)
Then collecting duct

Question 19

Which part of nephron reabsorbs water, minerals etc?

Answer 19

PCT, DCT and henle’s loop

Question 20

Ureter function?

Answer 20

Filtrate travels from duct to urinary bladder via ureter

Question 21

The unabsorbed filtrate after PCT DCT and henle’s Loop have absorbed the important minerals and water where does it remain Before this the waste containing liquid forms urine

Answer 21

In renal tubules

Question 22

Where does the urine come out of?

Answer 22

Urethra

Question 23

What are other excretory organs except the main urea excretory system?

Answer 23

Lungs excrete CO2
Liver excretes bilirubin, biliverdin, steroid hormones
Skin excretes sweat (salts, urea, lactic acid), and sebum

Question 24

Why is urine yellow

Answer 24

Urine is yellow due to urochrome

Question 25

What gives urine its odour

Answer 25

Urinoid

Question 26

Kidney maintain BP by what hormonal system

Answer 26

Renin-angiotensin system or renin-angiotensin-aldosterone system

Renin : kidney
Angiotensin : liver

Question 27

Angiotensin hormone secreted by?

Answer 27

Liver

Question 28

Renin hormone secreted by ?

Answer 28

Kidney