En el mundo hispanohablante, es común usar la hora militar. Si la hora de cenar es a las 21:00h, es a las:

Desde las dos (14:00) hasta las ocho (20:00) utilizamos:

In order to have a strong adaptive immune response, cells of the innate immune system need to work closely with cells of the adaptive immune system.  Which of the following combinations is the best example of innate cells interacting with cells from the adaptive immune system to increase an adaptive immune response?

The development of immunoglobulin (Ig) molecules and T-cell receptors (TCRs) in humans have some similarities as well as differences.  Which of the following statements best describes the development of these receptors in people?

Describe the chromosomal layout of the HLA complex.  Include a brief description of the structure and function of HLA Class 1 and HLA Class 2 proteins.  

Some  cells are able to directly kill tumor cells and virally infected cells by specifically recognizing cell surface antigens and then producing and releasing cytotoxic granules that lead to apoptosis.  Which of the following cells directly kill tumor cells and virally infected cells in this manner?

A 60-year-old woman was diagnosed with rheumatoid arthritis.  The complement level in her blood was lower than normal.  Which of the following best explains the drop in complement level as related to her disease?  

All of the following statements regarding the German attack on the Lusitania are true EXCEPT 

The chief threat to US “Open Door” policy in China and maintaining the balance of power in Asia came from 

The term “flapper” referred to