Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BIO 250
Osmoregulation
| Question | Answer |
|---|---|
| What is osmoregulation? | filtering out of nitrogenous wastes and retaining water, regulates the balance of salts in the body, typically linked to excretion |
| Nitrogenous wastes are produced by? | the deamination of amino acids and nucleic acids converted to ammonia |
| What non-toxic materials can ammonia be converted to? | ammonia, urea, and uric acid |
| Ammonotelism | the direct excretion of ammonia, requires large amounts of fresh water, some fish, turtles, amphs, crocs |
| Ureotelism | excretion of nitrogen in the form of urea, more ocncentrated excrement promotes water retention, some fish, amphs, mammals, and turtles |
| Uricotelism | excretion in the form of uric acid, most concentrated, little water loss, turtles, birds, crocs, lepidosaurs |
| Osmoconformers | maintain solute concentrations about isosmotic w/ surrounding water, hagfish, elasmobranchs, coelocanth, some amphs |
| Osmoregulators | maintain osmotic levels regardless of surrounding, fresh water and terrestrial verts, some marine verts |
| Marine verts in relationship to surrounding are? | hypotonic |
| Fresh water verts in relationship to surroundings are? | hypertonic |
| Fresh water osmoregulators | hypertonic to environment, tend to gain water, flush out a lot of water so they use ammonotelism |
| salt water osmoregulators | hypotonic to environment, tend to dehydrate, same problem as terrestrial verts |
| Terrestrial vertebrate osmoregulation difficulties | must avoid dehydration, kidneys, salt galnds, keratin, ventilation rates, turbinates, etc |
| Nephrons | filtration mechanism in the kidneys, transports ammonia based wastes to cloaca/ bladder |
| Glomerulus | efferent arteriole from this, gives rise to Vase Recta, creates current exchange that makes kidney salty |
| Wolfian ducts | precusor to male gonads, mesonphric ducts |
| Mullerian ducts | precusor to female gonads, paramesonephric ducts |
| Corpus cavernosa | paired, adjacent to pubic ramus, mammalian erectile organ |
| Corpus spongiosum | unpaired, males includes urethra, mammalian erectile organ |
| Gubernachlum ligament | pulls testes down from kidneys |
Created by:
lydia.durkovic
Popular Biology sets