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Which organ detects hypoxia and releases a hormone that stimulates the red bone marrow to produce red blood cells?

The raised bundles of muscle found in the wall of the ventricles are called the _____________.

To assist with venous return, muscles of the lower extremity contract which pushes blood proximally up through valves into large veins near the heart.  This mechanism is called the:  

Which of the following are prokaryotes?

Which type of blood would a person have if they have: A antigens on their RBCs anti-B-antibodies in their plasma Rh antigens on their RBC no Rh antibodies in their plasma    

The reactions of both the Intrinsic and Extrinsic pathways produce an enzyme called:

A patient has had a minor heart attack recently, which has weakened his heart contractility.  When measuring his blood pressure, what would you expect his pressure to be?

Which one of the following patients would have a normal cardiac output?

Please match the type of artery with its correct description:

During which phase of the cardiac cycle will blood move from the left atrium into the left ventricular?