Human Excretory System

Question 1

Human Excretory system consists of?

Answer 1

1) 1 pair Kidneys
2) 1 pair Ureters
3) 1 Urinary bladder
4) 1 Urethra

Question 2

Why right kidney is Lower than left kidney?

Answer 2

Because liver is located above it

Question 3

Shape of kidney?

Answer 3

Bean shaped

Question 4

Colour of kidney?

Answer 4

Reddish - Brown colour

Question 5

Length of kidney?

Answer 5

10-12cm

Question 6

Width of kidney?

Answer 6

5-7 cm

Question 7

Thickness of kidney?

Answer 7

2-3 cm

Question 8

Weight of kidney?

Answer 8

120-170 gm

Question 9

Location of kidney?

Answer 9

Close to dorsal inner wall of Abdominal cavity

Extends between T12(last Thoracic vertebrae)- L3(third lumbar vertebrae)

Question 10

Function of Ureter?

Answer 10

Conduct urine from kidneys to urinary bladder

Question 11

Epithelium of Ureter?

Answer 11

Transitional epithelium

Question 12

Shape of urinary bladder?

Answer 12

Pear - shaped

Question 13

Wall of urinary bladder consists of?

Answer 13

1) Smooth muscle called DETRUSSER muscle
2) Stretch receptors

Question 14

Function of urinary bladder?

Answer 14

Store urine

Question 15

Urethra is present in which organisms?

Answer 15

Only Mammals

Question 16

Function of urethra?

Answer 16

Excrete urine out of the body

Question 17

Male urethra is longer than female urethra .
Is it true?

Answer 17

Yes

Question 18

Name the sphincters present in urethra?

Answer 18

1) Internal Urethral Sphincter ( Involuntary)
2) External Urethral Sphincter (Voluntary)

Question 19

Ureter of male frog?

Answer 19

Urinogenital duct

Question 20

Process of release of urine is called?

Answer 20

MICTURITION

Question 21

MICTURITION reflex?

Answer 21

Urinary bladder half - filled >Stretch receptors send signal to CNS > Motor signal from CNS > Bladder muscles contract and sphincter muscles relax > Release of urine/ Micturition

Question 22

Kidney is covered by a covering called ?

Answer 22

Renal Capsule

Question 23

Outer part of kidney is called?

Answer 23

Renal Cortex

Question 24

What is Renal Columns of Bertini?

Answer 24

Cortical tissue between medullary pyramids

Question 25

Renal Pelvis ?

Answer 25

1) Broad funnel shaped space 2) Inner to Hilum 3) Projections called Calyces

Question 26

Hilum ?

Answer 26

1) A longitudinal notch on inner concave surface of kidney 2) Towards Centre 3) Ureters , Blood vessels and N erves enter through it

Question 27

Renal Medulla/ Renal Medullary Pyramids?

Answer 27

1) Inner part 2) In form of few conical masses called medullary pyramids 3) Projecting into Calyces

Question 28

Functional unit of kidney ?

Answer 28

Nephron

Question 29

Location of kidney?

Answer 29

Partly in cortex and partly in medulla

Question 30

No of Nephrons in each kidney ?

Answer 30

1 million ( 10 lakh)

Question 31

Nephron consists of ?

Answer 31

1) Glomerulus 2) Renal Tubule