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? 

Which hormone directly stimulates sperm production in the testes? 

Which hormone stimulates the milk let-down reflex? 

Identify the gland being pointed to. Be as specific as possible. _______

Which hormone lowers blood glucose levels? 

Identify the glands being pointed to. Do not abbreviate. _______