Which of the following is a pentameric immunoglobulin and is produced first in a primary response to an antigen?

Draw a well-labelled diagram of an antibody molecule.

Select the option that correctly matches the example with its specific type of immunity barrier.

Which antibody is present in abundant amounts in colostrum?

The spleen is a large bean-shaped organ which primarily acts as a filter of the blood by trapping blood-borne microorganisms. Which of the following statements is correct regarding the spleen?

Vaccination protects a person from disease because it...