7

Although the term "contractility" can refer to contraction of any muscle, including skeletal muscle (e.g. biceps) and smooth muscle (e.g. muscles in arterial walls), in medicine contractility usually refers to cardiac contractility, which in most fundamental terms is the force with which the heart muscle squeezes. According to the textbook Regulation of ...


3

You can think of blood volume and blood vessels as a closed system for your nitrates example. Vasodilation does not change blood volume; it changes the volume the container (the blood vessels) can hold. The result is that with more "room" for the blood to occupy, your blood pressure falls. That's why hypertensive emergencies (e.g. hypertensive ...


Only top voted, non community-wiki answers of a minimum length are eligible