Transport in humans

Which of the following vessels has thin muscle wall and a large lumen?

• Vein

• Artery

• Capillary

• Aorta

What type of blood vessel is shown in figure number 2?

• vein

• artery

• capilary

• aorta

Filtration is involved in the formation of tissue fluid because

• the wall of blood capillary is selectively permeable and acts as a filter.

• The hydrostatic pressure of the blood is lower than the tissue fluid.

• blood cells and plasma proteins block the pores on the wall of blood capillary.

• oxygen and nutrients can diffuse across the wall of blood capillary.

Arteries, except for the pulmonary artery, carry

*2015 Q30

• deoxygenated blood away from the heart under high pressure

• deoxygenated blood away from the heart under low pressure

• oxygenated blood away from the heart under high pressure

• oxygenated blood away from the heart under low pressure

The diagram shows the front view of a human heart.

Letters P, Q, R and S indicate the different chambers of the heart.

Which of the following shows the sequence in which a blood cell returning from other parts of the body passes through the four chambers of the heart?

• R-S-P-Q

• Q-S-R-P

• P-R-Q-S

• S-R-P-Q

The bar chart shows the concentration of oxygen in blood sampled at four places in the circulatory system of a human.

Which blood sample was taken from the pulmonary vein?

• A

• B

• C

• D

The graph below shows the changes in blood oxygen content and blood pressure along blood vessels (1), (2) and (3).

Which of the following best represents the identities of blood vessels (1), (2) and (3)?

• blood vessel 1: aorta

  blood vessel 2: capillary

  blood vessel 3: pulmonary vein

• blood vessel 1: pulmonary artery

  blood vessel 2: capillary

  blood vessel 3: pulmonary vein

• blood vessel 1: pulmonary vein

  blood vessel 2: pulmonary artery

  blood vessel 3: capillary

• blood vessel 1: pulmonary vein

  blood vessel 2: aorta

  blood vessel 3: capillary

The figure shows pressure changes in the aorta, left atrium, left ventricle during one complete heartbeat.

What causes the increase in pressure in point X?

• contraction in left atrium

• contraction in left ventricle

• relaxation in left atrium

• relaxation in left ventricle

The diagram shows three types of blood vessels, 1, 2 and 3.

Which option describes features of each vessel?

• A

• B

• C

• D

The diagram shows the longitudinal section of a blood vessel.

Which of the following combinations of the structures concerned enables blood to flow

from W to Z?

• A

• B

• C

• D