Module 3 Key Words Flashcards

1
Q

Exchange surface

A

Specialised area adapted to make it easier for molecules to cross from one side of the surface to another

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2
Q

Gaseous exchange

A

The movement of gases by diffusion between an organism and its environment across a barrier, e.g. The alveoli

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3
Q

Tissue

A

A group of similar, specialised cells working together to perform a common function

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4
Q

Tidal volume

A

Volume of air moved in and out of the lungs with each breath at rest

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5
Q

Vital capacity

A

Largest volume of air that can be moved in and out the lungs in one breath

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6
Q

Residual volume

A

-volume of air that always remains in the lungs even after the biggest possible exhale

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7
Q

Inspiratory reserve volume

A

-the volume of air that can be breathed in above the normal tidal volume

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8
Q

Expiratiry reserve volume

A

The volume of air that can be breathed out above the normal tidal volume

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9
Q

Transport

A

The movement of oxygen, nutrients, hormones, waste and heat around the body

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10
Q

Open circulatory

A

Blood not always in vessels

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11
Q

Closed circulatory

A

-blood always remains in vessels

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12
Q

Single circulatory

A

Blood passes through the heart once for one circuit of the body. Contains a pulmonary and systemic circuit

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13
Q

Double circulatory

A

Blood flows twice through heart for one circuit of the body. Contains a pulmonary and systemic circuit

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14
Q

Cardiac cycle

A

The sequence of events in one heartbeat

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15
Q

Myogenic

A

Muscle tissue that generates its own contraction

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16
Q

Fibrillation

A

-the chambers of the heart contracting out of rhythm

17
Q

Endothelium

A

A tissue that lines the inside of a structure e.g a blood vessel

18
Q

Partial pressure

A

The amount of pressure exerted by a gas relative to the total pressure exerted by all gases in the mixture

19
Q

Dissociation

A

The breakdown of a molecule into 2 molecules ( e.g. Oxyhaemoglobin into oxygen and haemoglobin )

20
Q

Bohr effect

A

Change in shape of the oxyhaemoglobin dissociation curve when carbon dioxide is present, carbon dioxide causes oxyhaemoglobin to dissociate more readily

21
Q

Transpiration

A

The loss of water by evaporation out of a leaf via the stomata

22
Q

Xerophyte

A

A plant that is adapted to reduce water loss by transpiration to survive in very dry conditions

23
Q

Translocation

A

The transport of assimilates between the sources and sinks of a plant in the phloem tissue, this requires energy

24
Q

Source

A

Where sucrose and other assimilates are loaded into the phloem e.g leaf

25
Sink
Where sucrose and other assimilates are unloaded from the phloem e.g flower
26
Assimilates
Carbon containing compounds produced by a plant using the carbon from carbon dioxide