Search found 7 matches

by Anna55
Sun Nov 20, 2011 3:00 pm
Forum: Evolution
Topic: Evolution of the nervous system
Replies: 14
Views: 12638

Thank you very much for everybody’s responses.
by Anna55
Sun Nov 06, 2011 1:40 pm
Forum: Evolution
Topic: Evolution of the nervous system
Replies: 14
Views: 12638

Evolution of the nervous system

For vertebrates the spinal column and the skull provides great protection from damage. Thinking in evolutionary terms, why does some nerves by-pass this protective system and travel outside of the spinal cord and its protective spinal column? When a human gets burned on the finger, the nerves in the...
by Anna55
Sun Oct 16, 2011 4:42 pm
Forum: Human Biology
Topic: How radioactive iodine causes cancer
Replies: 2
Views: 2874

Re: How radioactive iodine causes cancer

Thank you very much for the respond! I understand the process now.
by Anna55
Sat Oct 15, 2011 3:52 pm
Forum: Human Biology
Topic: How radioactive iodine causes cancer
Replies: 2
Views: 2874

How radioactive iodine causes cancer

Hello! Is this text correct? If you find an error, please explain it. Thank you in advance! The nuclear accident releases radioactive iodine-131 into the atmosphere, which spreads through wind and rain. Through the rain, the soil absorbs iodine and mushrooms absorb radioactive iodine by active trans...
by Anna55
Wed Sep 28, 2011 4:06 pm
Forum: Genetics
Topic: Mitochondrial disease
Replies: 2
Views: 10051

Mitochondrial disease

A father has mitochondrial disease and some of his children inherit the disease. Mitochondrial disease is passed from mother to offspring. How can the father be passing on the mitochondrial disease? The father may possess a recessive gene and show no symptoms of the disease. He may be able to pass o...
by Anna55
Fri Sep 23, 2011 4:01 pm
Forum: Cell Biology
Topic: Strength of anesthetic drugs
Replies: 2
Views: 4431

Re: Strength of anesthetic drugs

Ok, thank you for the advice! Yes, it is the size of the molecule. Yes, indeed!
by Anna55
Wed Sep 21, 2011 4:36 pm
Forum: Cell Biology
Topic: Strength of anesthetic drugs
Replies: 2
Views: 4431

Strength of anesthetic drugs

1) The strength of anesthetic drugs are roughly proportional to their ability to dissolve into lipid (fat). This is also true for different alcohols. 2) In the 1950s it was pointed out a correlation that the larger the volume of the anesthetic molecule the stronger the effect. The cell membrane can ...