Excretory system/ fluid acid base balance

Question 1

What does iso-osmotic mean?

Answer 1

Same concentration

Question 2

What does hypo-osmotic mean?

Answer 2

Lower osmotic concentration

Question 3

What does hyper-osmotic mean?

Answer 3

Higher osmotic concentration

Question 4

aquatic animals: osmoconformers

Answer 4

extracellular space conforms to external media

Question 5

aquatic animals: osmoregulators

Answer 5

maintain extracellular space as constant, always

Question 6

what is osmotic concentration?

Answer 6

the number of particles

e.g. NaCl 1 molar = 2 osmolar (Na+ & CL-)

Question 7

crayfish and excretion

Answer 7

antennal glands

Question 8

earthworms and excretion

Answer 8

metanephridia

Question 9

what does crayfish and earthworms urine production have in common?

Answer 9

ultrafiltration of primary urine

Question 10

what are the three compound of which urine can be made of?

Answer 10

uric acid
urea
ammonia

Question 11

what is the substance insect urine is made out of?

Answer 11

uric acid

Question 12

what are the advantages of uric acid?

Answer 12

it is solid waste & therefore not poisonous

saves water

Question 13

what is a requirement of ammonia urine?

Answer 13

lots of water required for its removal

Question 14

what is the invertebrate equivalent of vasopressin?

Answer 14

anneticin