Which of the following components of the immune system form memory cells after you receive a vaccine?

skin and saliva
monocytes and macrophages
neutrophils and histamines
b and t cells

B and T cells.

Explanation:

B cells and T cells are cells of adaptive immune system, which shows specificity, memory, and diversity against pathogens. When a particular antigen enters to the body, it triggers immune responses that activate naive B cells and T cells.

During activation, these cells divide to form 'effector B and T cells' that provide immediate responses against that antigen, and 'memory B and T cells' that provide response against that particular antigen during next or subsequent infections.  

Thus, the correct answer is option). B and T cells.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.