Blood Vessels Practice Questions

Blood flow through a capillary bed is regulated by precapillary sphincters.
True

Large veins, medium veins, and venules have valves to prevent the backflow of blood.
False

Increased capillary filtration, reduced reabsorption, or obstruction of lymphatic drainage can lead to edema.
True

The pulmonary circuit is the only route in which arteries carry less oxygen than veins.
True

The three primary branches of the celiac trunk are the common hepatic, left gastric, and splenic veins.
False

Blood filtered through the hepatic sinusoids exits the liver via the hepatic veins.
True

Arterial flow to the lower limb comes from the external iliac artery.
True

The brachial vein is the most common site of blood pressure measurement with the sphygmomanometer.
False

The radial artery is lateral to the ulnar artery.
True

Which vessels have the thickest tunica media?
Large arteries

Where is the greatest volume of blood found in the body?
Veins

Alternative routes of blood supply are called __________.
anastomoses

Which of the following is not a possible circulatory route from the heart?
Heart → arteries → capillary bed → vein → capillary bed → arteries → heart

In people who stand for long periods, blood tends to pool in the lower limbs and this may result in varicose veins. What causes the varicose veins?
Failure of the venous valves

Which of the following does not move substances across capillary walls?
Group transport

What is the most important force driving filtration at the arterial end of a capillary?
Blood hydrostatic pressure

What is taken up by the capillaries at their venous end?
Waste products

What is the most important force driving reabsorption at the venous end of a capillary?
Blood colloid osmotic pressure

How many pulmonary arteries empty into the right atrium of the heart?

Which of the following is absent in humans?
Right and left brachiocephalic arteries

Which vessel supplies 80% of the cerebrum?
Internal carotid artery

Which of the following best describes the cerebral arterial circle (circle of Willis)?
An anastomosis surrounding the pituitary gland

What are the major branches of the abdominal aorta from superior to inferior?
Celiac trunk, superior mesenteric artery, renal arteries, gonadal arteries, inferior mesenteric artery, and common iliac arteries

What is the longest vein commonly used in grafts in coronary bypass surgery?
Great saphenous vein

What is the path of blood flow from the heart to the lung tissues and back to the heart?
Right ventricle – pulmonary trunk – pulmonary arteries – lung tissues – pulmonary veins – left atrium

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