Lag period

Definition

The lag period is the initial phase after exposure to an antigen during which no antibodies are detectable in the blood. This period allows for the activation and proliferation of specific B lymphocytes.

5 Must Know Facts For Your Next Test

1. The lag period typically lasts between 3-6 days.
2. During the lag period, antigen-presenting cells process and present antigens to helper T cells.
3. B lymphocytes undergo clonal expansion and differentiation into plasma cells during this time.
4. The length of the lag period can be influenced by factors such as the nature of the antigen and previous exposures.
5. The lag period is followed by the log phase, where there is a rapid increase in antibody production.

Review Questions

Related terms

Clonal Expansion: The process by which B lymphocytes proliferate after encountering an antigen.

Plasma Cells:

Differentiated B cells that produce and secrete large amounts of antibodies.

Antigen-Presenting Cells (APCs):

Cells that process antigens and present them on their surface to T cells, initiating an immune response.