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Extra Credit: Lung compliance increases as the amount of surfactant in the lung increases. 

Extra Credit: Which of the following is in the normal range of hematocrits for women?

Extra Credit: John has blood type B. In an emergency, John could receive which of the following blood types? 

Fortunately, the bear turns around and slowly lumbers away. You are relieved that you will not have to release ___________ from pain neurons.

The white blood cells then proceed to engulf the bacteria, a process known as ____________.

The actual action potential (big upward spike) of cardiac pacemaker cells is caused by 

Meanwhile the neurons in your brain are firing action potentials and releasing _____________ across the synaptic clefts. You have gotten away from the rusty nail, taken care of the small wound, and are reminding yourself to not pick too soon at the scab, while marveling at the amazing structure and function of your own body.

Worn out or damaged RBCs are “recycled” by phagocytic cells in the organs called

What type of antigens are present in Type O blood? 

The ______________ are the last part of the electrical conducting system of the heart.