Which antibody class is the first to be produced during an infection?

Which of the following is a function of lymph?

What enzyme is found in tears and acts as a chemical barrier?

What is the function of valves in veins?

What is the term for the force exerted by blood on vessel walls?

Approximately what fraction of the total blood volume is held in veins and venules?

Which of the following is NOT a venous return mechanism?

What condition results from blocked lymphatic drainage?

You are purifying a protein rich in acidic amino acids from a whole cells extract of proteins. You will use a column with a solid resin to bind and enrich your protein in the next step of the purification. Which of the following resins would most efficiently bind your protein of interest?    

For the cell nucleus, list 4 structural features (components) and give one function for each feature.