Compare the efficiency of mammal lungs and fish gills
What will be an ideal response?
Fish gills are 80% to 90% efficient. This is due to countercurrent exchange. Mammalian lungs are only
about 25% efficient. However, the oxygen content in water is low compared to air.
You might also like to view...
During conscious quiet rest, the brain is emitting
a. alpha waves. b. beta waves. c. delta waves. d. gamma waves. e. rapid, irregular waves.
Matching. Choose the one most appropriate answer
for each. 1. ___ aggregate fruit 2. ___ anther 3. ___ carpel 4. ___ embryo sac 5. ___ endosperm mother cell 6. ___ megaspores 7. ___ micropyle 8. ___ microspores 9. ___ multiple fruit 10. ___ ovary 11. ___ ovule 12. ___ petal 13. ___ pollen grain 14. ___ sepal 15. ___ stigma A. male spores of anthers B. site where pollen tube usually penetrates the ovule C. develops into a fruit at maturity D. a 2n cell that will help form nutrients for the developing plant embryo E. cluster of matured ovaries attached to a common receptacle F. modified leaf with pigments and fragrance-producing cells G. immature male gametophyte H. female reproductive organ I. landing platform for pollen J. pollen-bearing structure K. female spores of ovule L. outermost whorl of leaf parts on a receptacle; generally green, but sometimes pigmented M. female gametophyte N. matured ovaries of several flowers fused together into a single mass (for example, pineapple, fig) O. forms a seed at maturity
Prednisone is a glucocorticoid hormone that is sometimes prescribed to treat rheumatoid arthritis, asthma, and severe allergic reactions. If prednisone were taken for several weeks, which one of the following might occur?
A) Production of natural cortisol may decrease. B) Production of estrogen by the ovaries may decrease. C) Levels of thyroid hormone may be elevated. D) Levels of aldosterone may be elevated. E) Levels of parathyroid hormone may be decreased.
Nutrients, salts, and proteins: plasma solutes:
a. arteries and veins:lymphatic vessels b. erythocrytes and leukocytes:blood cells c. platelets and megakaryotes:leukocytes d. lymphocytes and macrophages: erythocytes