Search found 39 matches

by clarence
Tue Oct 11, 2005 3:21 pm
Forum: Evolution
Topic: New Life
Replies: 11
Views: 9480

Try a comparative anatomy book, like Kardong's "Vertebrates". It even explains the mechanism behind these lungfishes' adaptation to drought. Quote from p. 97, "Vertebrates" by Kardong 2nd ed. (from a figure): "Reduced basal metabolism requires only infrequent breating. The lungfish draws in fresh ai...
by clarence
Mon Oct 03, 2005 6:30 pm
Forum: Human Biology
Topic: Hormones
Replies: 4
Views: 5171

1) Explain how the presence of only a very small amount of steroid hormone in the intercellular fluid can result in a large change in the activity of the cell. Lipid soluble hormones, including steroid hormones, bind to receptors via diffusion within target cells. Such hormones alter gene expressio...
by clarence
Mon Oct 03, 2005 5:26 pm
Forum: Botany Discussion
Topic: Plant evolution.
Replies: 19
Views: 14460

Re: Plant evolution.

Hi, I was just wondering if anyone new why plants have not evolved to use the energetic ultra-violet wavelengths of light in photosynthesis. I would really appreciate a quick response. Thanks, Zenn. Chlorophyll does not utilize high energy quanta because they contain too much energy. Each is powerf...
by clarence
Mon Oct 03, 2005 5:13 pm
Forum: Zoology Discussion
Topic: How snakes mate?
Replies: 4
Views: 16906

In snakes and lizards, males have a pair of intromittent organs called hemipenes, protrusible saclike diverticula at the entrance of the cloaca. During copulation, the retractor muscles of the hemipenes relax, turning the sacs inside out and allowing the flow of semen along a groove into the female'...
by clarence
Mon Oct 03, 2005 5:01 pm
Forum: Zoology Discussion
Topic: Appendix in Herbivores
Replies: 5
Views: 8931

The human appendix? The human appendix, at the junction of the small and large intestines, is a much reduced cecum. Its small size reflects its negligible role on cellulose fermentation. It no longer harbors large-scale microbial fermentation like in herbivores. It is wrong to assume that since the ...
by clarence
Sat Jul 09, 2005 2:38 pm
Forum: Human Biology
Topic: functions
Replies: 8
Views: 9775

Here's the source. You might be needing it.
Tortora G., Grabowski S. R., Principles of Anatomy and Physiology 10th ed., pp. 712, 957-60
by clarence
Sat Jul 09, 2005 8:46 am
Forum: Human Biology
Topic: functions
Replies: 8
Views: 9775

Re: functions

What's the function/s of the following: _renin granules in the juxtaglomerular cells _macula densa _podocytes Renin When blood volume falls or blood flow to the kidneys decreases, juxtaglomerular cells secrete renin into the bloodsteam. In sequence, renin and angiotensin converting enzyme act on th...
by clarence
Fri Jul 01, 2005 10:52 am
Forum: Evolution
Topic: Darwin's Black Box
Replies: 11
Views: 12228

Here's a link: Evolution of the Bacterial Flagella http://www.health.adelaide.edu.au/Pharm/Musgrave/essays/flagella.htm
by clarence
Thu Jun 30, 2005 11:37 am
Forum: Evolution
Topic: Irreducible complexity
Replies: 3
Views: 4887

I have heard about irreducible complexity, from the book "Darwin's Black Box". It is a book authored by Michael Behe, a biochemist from Lehigh University. The complete title is "Darwin's Black Box: The Biochemical Challenge to Evolution", published in 1996 by Free Press. The book's thesis statement ...
by clarence
Tue Jun 14, 2005 3:23 pm
Forum: Evolution
Topic: Kansas Board of Education
Replies: 19
Views: 15159

Here is the transcript of the May 5 Science Hearing of the Kansas State Board of Education http://www.ksde.org/outcomes/schearing05052005.pdf . The notable thing about the hearing are the contradictory statements made by William Harris, PhD while being cross-examined by Mr. Pedro Irigonegaray. "Will...
by clarence
Fri Jun 10, 2005 11:23 am
Forum: Microbiology
Topic: HIV-1 and AIDS
Replies: 3
Views: 7456

Here's a very detailed information about the pathology of AIDS. http://www-medlib.med.utah.edu/WebPath/TUTORIAL/AIDS/AIDS.html The Textbook of AIDS Pathology discusses almost all aspects of AIDS, like the diagnosis, progression, prevention, treatment and future therapies of AIDS.
by clarence
Fri Jun 10, 2005 11:12 am
Forum: Human Biology
Topic: Future of Central Retinal Artery Occlusion Treatment??
Replies: 23
Views: 15026

Try searching on google. Lots will come up.