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_____ – at the start all heart valves are closed, then chamber decreases in size, push blood into ventricles finally both semilunar valves open and push blood out of the heart

B cell activation would not occur without _____ from a(n) _____

Two hormones that have additive effects are called

B cell activation would not occur without _____ from a(n) _____

The body content of water or electrolytes will fail if _____ exceeds _____

During the alarm phase of the general adaptation syndrome (GAS), there is

Blood returning from the pulmonary circuit first enters the

During the alarm phase of the general adaptation syndrome (GAS), there is

In the _____ phase, a platelet plug is formed that may close the break, several chemicals released, platelets are activated and aggreate at the side and adhere to the damage surface

A property of immunity where the immune system can differentiate from thousands of antigens and produces a appropriate and specific response to each antigen