Exam 13: The Vascular System

In veins,backflow of blood is prevented by ____________________.

Angiotensin II causes ____ and the secretion of the hormone ____.

The superior mesenteric artery is a branch of the:

The purpose of the foramen ovale and the ductus arteriosus is to permit most blood to:

thoracic aorta

A normal blood pressure is considered to be below ____________________.

In the fetus,the foramen ovale permits blood to flow:

The large arteries are elastic and recoil during left ventricular ____________________,thereby raising ____________________ BP.

The nerves to the smooth muscle of all arteries and veins are:

Capillaries are the site of ____________________ between the blood and tissues.

The hormone that raises blood pressure by increasing heart rate and force of contraction is ____________________.

The effect of the hormone aldosterone on blood pressure is to:

Which artery is NOT paired with the part of the body to which it supplies blood?

The fetal structure that permits blood to flow from the pulmonary artery to the aorta is the:

In the wall of a vein,the layer that is folded into valves is the ____________________.

The purpose of hepatic portal circulation is to enable the liver to:

Blood flows from the fetus to the placenta through the:

Which statement is NOT true of the structure of arteries and veins?

The flow of venous return is kept to one direction only by the ____________________ in the veins.

In capillaries,the process of filtration depends on ____________________.