These specialized proteins work by recognizing and sticking to specific proteins on the surfaces of viruses and bacteria in a highly specific way.  What are these proteins generally called and what cells produce them?

What are the vessels that carry blood away from the heart called?

A physiological ________ is a difference in chemical concentration, electrical charge, physical pressure, temperature, or other variables between one point and another.  As learned in Bio 150 and 151, chemicals in a solution can move down a concentration slope. This means the chemical will move from the area of ________ concentration to the area of ________ concentration.

Each of the following groups list the tissue layers of the digestive tract.  Which one has them in correct order from the external surface to the lumen?

Which statement is NOT correct regarding the heart’s chambers?

Water conservation or elimination from the kidney occurs in the _________________________ which is stimulated by ____________________________.

What are the vessels that carry blood back to the heart called?

For the last minute you have been quietly reading without thinking about it.  During this time, you have been taking in an amount of air called the _________________ into your lungs with each breath.

Most oxygen in the blood is transported

Which statement is NOT true about the thymus?