Exchange - Mass Transport: Key Terms Flashcards

1
Q

Loading/associating with oxygen

A

The process by which haemoglobin binds with oxygen

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2
Q

Unloading/dissociating with oxygen

A

The process by which haemoglobin releases its oxygen

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3
Q

Oxygen dissociation curve

A

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

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4
Q

Positive cooperativity

A

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

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5
Q

Ventricle

A

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

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6
Q

Atrium

A

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

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7
Q

Coronary arteries

A

The blood vessels that the heart supplies itself with

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8
Q

Systole

A

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

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9
Q

Tissue fluid

A

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

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10
Q

Ultrafiltration

A

Filtration assisted by blood pressure

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11
Q

Xylem vessels

A

Hollow tubes made of dead cells that transport water

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12
Q

Turgid

A

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

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13
Q

Transpiration

A

The evaporation of water from leaves

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14
Q

Cohesion

A

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

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15
Q

Source

A

The site of sucrose production

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16
Q

Sink

A

The place where sucrose is stored

17
Q

Diastole

A

The stage in the cardiac cycle when the heart muscle relaxes

18
Q

Stroke volume

A

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