Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
12 Cards in this Set
- Front
- Back
|
1. What type of waste does excretion typically get rid of?
|
Urea
|
|
|
2. What are the three major forms of nitrogenous waste?
|
NH3
Urea (NH3 + CO2) Uric Acid |
|
|
3. What are the advantages and disadvantages of the three types of waste?
|
NH3: excreted across membrane, toxic
Urea: uses less H2O, less toxic Uric Acid: requires least H2O but most energy, (birds, insects), least toxic |
|
|
4. What are the basic steps of excretion?
|
blood gets filtrated, reabsorbed, secreted, excreted
|
|
|
5. What is the major significance of the Choanoflagellata?
|
nearest relative to animals
|
|
|
6. How do choanoflagellates eat?
|
collar cells: flagellum beats food into collar where it is absorbed
|
|
|
7. Does the Porifera have true tissues?
|
NO: lack true tissue
|
|
|
8. What does totipotent mean?
|
cell fate is undetermined, ability to change type
|
|
|
9. For the Porifera, know species, diversity, fossil origin, and habitat.
|
species- Parazoa
diversity- 5,500 species fossil origin- Neoproterozoic Era habitat- benthic marine habitats |
|
|
10. What are the major cell types and functions in the Porifera?
|
Pinacocytes: surface layer, protective
Porocytes: surround ostial (sml) openings Amoebocytes: food transport/structural support (spicules) Choanocytes: collar cells, beat flagella into collar, bring in food, sperm/egg production-- |
|
|
11. What is the overall body design in Porifera and how does in accomplish eating, excretion, reproduction, and other major functions of life?
|
eating- collar cells
reproduction- sexual: sperm released then captured by choanocytes asexual: gemmules (packages of cells) germinate and grow |
|
|
12. What do humans use sponges for (besides washing dishes)?
|
drugs
anti-viral/ anti-cancer |
