IB 6.2 Tissue Exchange

Which end of a capillary has the greatest hydrostatic pressure?

• Arterial end

• Venous end

• It is equal throughout

What is blood plasma?

• Red blood cells

• White blood cells

• Water and dissolved substances in the vessels

• Water and dissolved substances surrounding cells

Which option shows only useful contents of the blood plasma?

• Water, carbon dioxide, ions and oxygen

• Water, glucose, hormones and urea

• Carbon dioxide, hormones, glucose and oxygen

• Oxygen, glucose, hormones and ions

What is the difference between blood plasma and tissue fluid?

• Its contents

• Its location

• Its pressure

What causes blood plasma to become tissue fluid?

• Hydrostatic pressure forces it out of the arterial end of the capillary

• Hydrostatic pressure forces it out of the venous end of the capillary

• High water potential in the capillary relative to tissues causes osmosis

• High osmolarity in the capillary relative to the tissues causes diffusion

Which statement is true?

• Tissue fluid contains more urea than the cells themselves

• Tissue fluid contains more oxygen than the cells themselves

• Cells contain more oxygen than tissue fluid

• Cells contain less urea than the tissue fluid

By which process does most material exchange occur?

• Osmosis

• Active transport

• Endocytosis

• Facilitated diffusion

• Simple diffusion

At which end of the capillary is tissue fluid reabsorbed?

• Arterial end

• Venous end

What causes the reabsorption of tissue fluid?

• Low osmotic pressure in the tissues combined with low hydrostatic pressure in the capillary

• Low osmotic pressure in the tissues combined with high hydrostatic pressure in the capillaries

• High osmotic pressure in the tissues combined with high hydrostatic pressure in the capillary

• High osmotic pressure in the tissues combined with low hydrostatic pressure in the capillary

What happens to tissue fluid that is not reabsorbed?

• It stays in the tissues and causes swelling

• It is eventually reabsorbed by the capillary

• It is absorbed by lymph vessels and returned to the blood via the vena cava

• It is absorbed by lacteals in the ileum