BIO excretion and osmoregulation

Question 1

excretory structure of protozoans

Answer 1

general body surface or contractile vacuoles in some cases.

Question 2

excretory structure of coelenterates

Answer 2

general body surface with simple diffusion.

Question 3

excretory structure of sponges

Answer 3

general body surface and contractile vacuole if fresh water habitat

Question 4

excretory structure of platyhelminthes

Answer 4

flame cells or protonephridia or solenocytes

Question 5

flame cells are which type of nephridia

Answer 5

protonephridia

Question 6

nematodes have which excretory structure

Answer 6

H-shaped rennette cell

Question 7

excretory structure in annelids (earthworms)

Answer 7

nephridia

Question 8

types of nephridia earthworm has

Answer 8

septal, integumentary, pharyngeal

Question 9

excretory organ of a crustacean is

Answer 9

green gland or antennal gland.

Question 10

arachnides have which excretory organ?

Answer 10

coxal gland

Question 11

insects have which excretory organ

Answer 11

malpighian tubule

Question 12

where are the malpighian tubules of cockroach located?

Answer 12

between midgut and hindgut

Question 13

excretory structures of molluscs

Answer 13

organ of bojanus, keber’s organ, metanephridia

Question 14

excretory structre of echinoderms is

Answer 14

absent and excretion through tube feet or primitive gills called dermal branchiae

Question 15

excretory structure in hemichordates

Answer 15

glomerulus or proboscis gland

Question 16

excretory structure in urochordates

Answer 16

neural gland or nephrocytes

Question 17

excretory structure in cephalochordata

Answer 17

solenocytes
protonephridia 
brown funnel 
renal papilla 
hatschek nephridia

Question 18

excretory product of marine telosts fishes is

Answer 18

ammonia

Question 19

fishes excrete ammonia as and through

Answer 19

NH4+ ions through the gills

Question 20

sharks produce urea but excretory product is ammonia . why?

Answer 20

because they retain most of urea in body as osmolyte

Question 21

aquatic mammals has excretory product

Answer 21

urea

Question 22

marine fishes or cartilagenous fishes excrete

Answer 22

urea

Question 23

urea is produced in

Answer 23

liver

Question 24

urea is produced through

Answer 24

ornithine cycle or krebs-hansleit cycle

Question 25

amino acids participating in urea synthesis are

Answer 25

arginine, ornithine, citrulline

Question 26

enzyme essential for urea synthesis is

Answer 26

arginase

Question 27

excretory product in non primates which is absent in humans is

Answer 27

allantoin (formed from uric acid)

Question 28

Trimethyl amine oxide (TMO) is excretory product of

Answer 28

marine bony fishes

Question 29

bile pigments are formed from

Answer 29

haem of hemoglobin

Question 30

major bile pigment is

Answer 30

bilirubin

Question 31

jaundice is formed due to

Answer 31

deposition of bile pigments

Question 32

duct of mesonephric kidney is called

Answer 32

wolffian duct or mesonephric duct

Question 33

only part of human excretory system which isn’t mesodermal in origin is

Answer 33

urinary bladder

Question 34

kidney is located (outside/inside) coelomic cavity

Answer 34

outside

Question 35

kidney is covered by peritoneum by which side

Answer 35

ventral

Question 36

white fibrous connective tissue covering kidney

Answer 36

renal capsule

Question 37

extension of cortex in medulla is called

Answer 37

columns of bertini

Question 38

tip of pyramid is called and it is the site of

Answer 38

papilla and duct of belini