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module 3 > Exchange Surfaces & Breathing > Flashcards

Exchange Surfaces & Breathing Flashcards

1
Q

Why is diffusion enough for single celled organisms

A

Metabolic activity of a single-celled organism is usually low, therefore O2 demands & CO2 production of the cell are low
The SA:V ratio of the organism is large

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2
Q

Features of specialised exchange surfaces

A
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3
Q

Structures of mammalian gaseous exchange surfaces

A
  1. Nasal Cavity
  2. Trachea
  3. Bronchus
  4. Bronchioles
  5. Aleveoli
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4
Q

Functions / characteristics of nasal cavity

A
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5
Q

Functions / characteristics of the trachea

A
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6
Q

Functions / characteristics of bronchus

A
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7
Q

Functions / characteristics of bronchioles

A
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8
Q

Functions / characteristics of Alveoli

A
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9
Q

Exchange surfaces specialised tissue?

A
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10
Q

What is ventilation of the lungs

A

How air is moved in & out as a result of pressure changes in the thorax (chest cavity)

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11
Q

What’s inspiration & what occurs during it

A
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12
Q

What is expiration & what occurs during it

A
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13
Q

Ventilation rate =

A

Tidal volume x breathing rate

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14
Q

Breathing rate =

A

Number of breaths taken in 1 minute
One breath = air in & out

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15
Q

What’s oxygen uptake

A

The volume of oxygen used up by someone in a given time

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16
Q

What’s vital capacity

A

The max volume of air that can be breathed in or out in one breath

17
Q

What’s tidal volume

A

The volume of air that is breathed out or in during normal breathing
At rest

18
Q

How do we find these diff breathing measurements

A

Using a spirometer

19
Q

How is a spirometer used

A

To find diff breathing measurements
You breathe in & out through air

->.CO2 is absorbed from the exhaled air by soda lime, to limit the CO2 conc as if it’s too high = respiratory distress

20
Q

Diagram of breathing graph

A
21
Q

Normal expiration vs forced expiration

A

module 3 (11 decks)

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