Exam 17: Genes and The Immune System

Because there are so many HLA allele combinations,it is rare to find unrelated individuals with the same HLA halplotypes.

____________________ result from immunological hypersensitivity to what should be harmless substances.

To protect future Rh+ fetuses,pregnant Rh- mothers are given RhoGam in order to destroy ____________________ fetal cells that enter the mother's blood.

Incompatibility in the Rh blood system can result in hemolytic disease of the newborn.Which combination poses the greatest risk?

The chemicals that attract neutrophils to a site of infection are called ____________________.

____________________,such as ulcerative colitis and Crohn disease,develop when bacteria are able to breach the barrier between the digestive system and the body.

B cells are genetically programmed to produce unique antibodies; similarly,T cells are genetically programmed to produce unique T-cell receptors.

As part of the inflammatory response,_____ engulf and destroy invading bacteria.

The transplant of pig bone marrow into a human recipient may overcome the ____________________ triggered by transplanted pig organs.

The major obstacle to the use of xenotransplants is _____.

A person with blood group A has both A and B type antibodies.

Juvenile diabetes (or insulin-dependent diabetes)results when insulin-producing cells in the pancreas are destroyed by the patient's own immune system.

Once formed,B cells mature in the _____,while T cells mature in the _____.

Why are skin grafts between identical twins more successful than grafts between more unrelated individuals?

Of the four types of T cells,only the ____________________ T cells destroy infected body cells.

How can so many antibody molecules be made in a relatively short period of time?

How many HLA haplotypes does each human have?

Explain why individuals with type O blood can donate to any other blood type,and why individuals with type AB blood can accept blood of any blood type.

Most of the organisms that normally inhabit our skin help defend us against infection.

The life threatening body-wide response that can occur when allergens enter the circulatory system and cause a severe drop in blood pressure is called ____________________.