BONUS After a meal, ectotherms often situate themselves in a warm and or sunny spot.  This can be critical to the health of the animal.  Why is this process important?

The primary stimulus for the release of erythropoietin is

When the plasma concentration of a substance exceeds its renal concentration, more of the substance will be

Put these phases of the cardiac cycle in the correct order.1  opening of the semilunar valves2  beginning of atrial systole3  closure of the AV valves4  completion of ventricular filling5  beginning of ventricular systole6  ventricular relaxation

In the collecting ducts of the kidney, antidiuretic hormone promotes water conservation by increasing the assembly of . (be specific)

The primary function of erythrocytes is to participate in immune reactions.​

As filtrate moves through the ____ in mammals, it generally undergoes a dramatic decrease in osmolarity.​

________ interstitial osmolarity allows urine to be concentrated.

Why is proper ventilation important for a respiring animal?​

Signals from the atrioventricular (AV) node are carried to the bottom of the heart by ____.​