Exchange - Mass Transport: Key Terms

Question 1

Loading/associating with oxygen

Answer 1

The process by which haemoglobin binds with oxygen

Question 2

Unloading/dissociating with oxygen

Answer 2

The process by which haemoglobin releases its oxygen

Question 3

Oxygen dissociation curve

Answer 3

The graph of the relationship between the saturation of haemoglobin with oxygen and the partial pressure of oxygen

Question 4

Positive cooperativity

Answer 4

It takes a smaller increase in the partial pressure of oxygen to bind to the second oxygen molecule than the first

Question 5

Ventricle

Answer 5

Lower chamber of the heart, Thick wall to contract strongly to pump the blood to the extremities of the body

Question 6

Atrium

Answer 6

Upper chamber of the heart that receives blood Thin-walled, elastic and stretches as it collects blood

Question 7

Coronary arteries

Answer 7

The blood vessels that the heart supplies itself with

Question 8

Systole

Answer 8

The stage in the cardiac cycle in which the heart muscle contracts

Question 9

Tissue fluid

Answer 9

Fluid that surrounds the cells of the body. It has a composition similar to that of blood plasma except that it lacks proteins

Question 10

Ultrafiltration

Answer 10

Filtration assisted by blood pressure

Question 11

Xylem vessels

Answer 11

Hollow tubes made of dead cells that transport water

Question 12

Turgid

Answer 12

A plant cell that contains the maximum volume of water it can

Question 13

Transpiration

Answer 13

The evaporation of water from leaves

Question 14

Cohesion

Answer 14

Water molecules tend to stick together as they form hydrogen bonds between one another

Question 15

Source

Answer 15

The site of sucrose production

Question 16

Sink

Answer 16

The place where sucrose is stored

Question 17

Diastole

Answer 17

The stage in the cardiac cycle when the heart muscle relaxes

Question 18

Stroke volume

Answer 18

The volume of blood pumped at each ventricular contraction of the heart