AP BIOLOGY

Detailed explanation-1: -Adaptive immunity: Adaptive (or active) immunity develops throughout our lives. We develop adaptive immunity when we’re exposed to diseases or when we’re immunized against them with vaccines. Passive immunity: Passive immunity is “borrowed” from another source and it lasts for a short time.

Detailed explanation-2: -The thymus is a primary lymphoid organ essential for the development of T lymphocytes, which orchestrate adaptive immune responses.

Detailed explanation-3: -Antibody production is one of the most important ways that immunity is developed. There are two types of adaptive immunity: active and passive.

Detailed explanation-4: -There are four characteristics of adaptive immunity: antigenic specificity, diversity, immunologic memory and ability to distinguish between self and non-self. An immune response involves Lymphocytes (B-cells and T-cells) and antigen presenting cells (macrophages, B-cells, and dendritic cells).

Detailed explanation-5: -Evolution of the human immune system However, over the lifetime of an individual, these immune mechanisms change, first to adapt to the change from fetus to infant, and then to mature and expand during growth, subtly changing in pregnancy and finally decreasing in senescence.