Chapter 10
Animal Physiology: From Genes to Organisms · 4 exercises
Problem 3
Dendritic cells, helper \(T\) cells, and B cells with their antibodies can be considered as sensors, integrators, and effectors, respectively, of a negative-feedback system. Explain.
4 step solution
Problem 5
Explain how the mammalian body and its acquired immune system respond when the body is invaded by an influenza virus that has evolved new antigens.
5 step solution
Problem 7
Cheetahs are highly susceptible to diseases such as feline infectious peritonitis (FIP), which kills less than \(10 \%\) of other cats but \(50 \%\) of cheetahs. Cheetahs are nearly identical genetically, apparently due to a crash in population numbers perhaps 10,000 years ago. Explain why low genetic diversity in these cheetahs and also in inbred domestic animals makes acquired immunity less effective.
5 step solution
Problem 8
Feline immunodeficiency virus (FIV) is a common and ultimately fatal disease of cats; much like HIV, FIV damages T cells. Explain all the possible problems that could result from this. Also, like HIV, FIV mutates rapidly into new strains. Veterinarians can give cats an FIV vaccine; explain how it might work to protect the cat and why it might not work.
5 step solution