Transport in humans

Which of the following types of blood vessels has the largest total surface area in a mammalian body?

• aorta

• arteries

• veins

• capillaries

Valve II lies

• between the aorta and the left ventricle.

• between the pulmonary artery and the right ventricle.

• between the left atrium and left ventricle.

• between the right atrium and right ventricle.

In a fasting condition, which of the following blood vessels carries blood with the highest glucose level?

• aorta

• pulmonary artery

• hepatic vein

• hepatic portal vein

After having a meal, which of the following blood vessels carries blood with the highest glucose level?

• aorta

• pulmonary artery

• hepatic vein

• hepatic portal vein

How many times must a red blood cell pass through the right ventricle if it is to move from the lungs to the kidney and then back to the lungs again?

• 0

• 1

• 2

• 3

The wall of an artery is thicker than that of a vein because an artery

(1) contracts rhythmically to transport blood forward.

(2) possesses valves to prevent the backflow of blood.

(3) has to withstand high blood pressure.

• (1) only

• (3) only

• (1) and (3) only

• (1), (2) and (3)

In blood donation, blood is collected from the vein instead of the artery because

• blood in the vein contains less oxygen.

• the vein has a larger lumen than the artery.

• the wall of the vein is thinner than that of the artery.

• the blood pressure in the vein is lower than that in the artery.

What will be the effect on a person if there is a hole in the septum?

• The person may develop anaemia.

• The person may have a heart attack easily.

• The person's blood may not be able to clot normally.

• The person's arterial blood may contain a lower level of oxygen than normal.

The diagram above shows a section through a villus. Which of the following are the functions of structure P? Structure P receives blood from

• the lymph vessel.

• the aorta.

• the hepatic artery.

• the hepatic portal vein.

Normally, blood does not contain

• fat.

• proteins.

• bile pigments.

• carbon dioxide.