Exam 49: The Immune System in Animals

A small child falls down and cuts his knee.A few days later a scab forms over the wound.After a few weeks,the wound does not appear to be healing,but it is not infected.Which of the following could explain this?

Which of the following would put you at increased risk of pathogens entering your body?

What major advantage is conveyed by having a system of acquired immunity?

Which of the following is a difference between B cells and T cells?

Which of the following best describes what an antigen is?

In an ELISA test (enzyme-linked immunosorbent assay)what is the reason alkaline phosphatase is linked to the secondary antibody?

Based on the above information,which of the following is the most likely explanation for the effect of oxygen levels on production of reactive oxygen intermediates (ROIs)?

You and a friend are in line for a movie when you notice the woman in front of you sneezing and coughing.Both of you have been equally exposed to the woman's virus,but over the next few days,only your friend acquires flu-like symptoms and is ill for almost a week before recovering.Which one of the following is a logical explanation for this?

Why did the researchers keep carbon dioxide levels constant while they varied oxygen levels and then keep oxygen levels constant while they varied carbon dioxide levels?

Which of the following is a difference between a primary and a secondary immune response?

All of the following are differences between a B-cell receptor and an antibody produced by a B-cell except that

Which of the following pairs of proteins shares the most overall similarity in structure?

You cut your finger,and after putting pressure on the wound for several minutes,you notice that it is still bleeding profusely.What may be the problem?

Mucus occurs in both the respiratory and digestive tracts.What is its main immunological function?

If you were developing artificial B-cell receptors (BCRs)based on the natural version and wanted to change the BCRs' ability to bind certain antigens,which region of the natural receptor would you alter?

In previous chapters,you learned about osmotic and diffusion gradients that aid in maintaining water and ion balance and in developing resting potentials in cells,among other important biological features.How does the immune system of vertebrates exploit a chemical gradient?

What is the difference between a secondary immune response occurring without a vaccine compared to the same response occurring after a vaccine?

Which of the following is the best definition of autoimmune disease?