What type of medication is digoxin?

Match correct pairs of terms with images:

Match the artwork and the period style:

Caravaggio invented this type of dramatic spot lighting:

Rembrandt came from this region:

Bernini did some of his most famous artworks in this city:

What is this structure? _______

A B-cell will present a foreign antigen on a (i)___ receptor to the Helper T-cell’s (ii)___ receptor.

Consider a child with an autoimmune disease. Because of this child’s condition she is unable to receive vaccinations. In order to protect this child from those diseases she could have otherwise been vaccinated against, approximately ____ of the population must be vaccinated. This is called herd immunity.

Which hormone initiates and regulates the sleep/wake cycle?