Respiratory System At Rest Flashcards Preview

A-Level PE Anatomy And Physiology > Respiratory System At Rest > Flashcards

Flashcards in Respiratory System At Rest Deck (39)
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1

Define pulmonary ventilation

Pulmonary ventilation is the process of breathing in and out

2

Define the two areas of gaseous exchange

1. External respiration happens at the lungs
2. Internal respiration happens at the muscles

3

Describe the two pathways oxygen gets carried through the blood

1. Combines with haemoglobin to form oxohaemoglobin which transports 97% oxygen
2. Oxygen dissolves in blood plasma which transports 3% of it

4

Describe the three ways at which C02 is transported through the body

1. Combines with haemoglobin to form carbaminohaemoglobin which transports 23%
2. Gets dissolved in blood plasma which transports 7%
3. Dissolves in water as carbonic acid and transports 70%

5

What percentage of 02 is transported as oxohaemoglobin

97%

6

What percentage of O2 is dissolved in blood plasma to be transported

3%

7

What percentage of CO2 is transported as carbaminohaemoglobin

23%

8

What percentage of CO2 dissolves in blood plasma to be transported

7%

9

What percentage of CO2 dissolves in water as carbonic acid to be transported

70%

10

What are the 6 steps in the passage of air to the lungs

Nose, pharynx, larynx, trachea, bronchi, alveoli

11

During inspiration, the diaphragm and external intercostals...

Contracts

12

During inspiration, the rib cage moves...

Up and out

13

During inspiration, the volume of the theocratic cavity...

Increases

14

During inspiration, the pressure inside the lungs...

Decreases

15

During inspiration, the air rushes...

Into the lungs

16

During expiration, the diaphragm and external intercostals...

Relax

17

During expiration, the rib cage moves...

Down and in

18

During expiration, the volume of the thoracic cavity...

Decreases

19

During expiration, the pressure inside the lungs...

Increases

20

During expiration, the air rushes...

Outside the lungs

21

What is inspiration said to be

Active

22

What is expiration said to be

Passive

23

Define gaseous exchange

Gaseous exchange is the movement of O2 and CO2 at the muscles and lungs by the process of diffusion

24

Define diffusion

Diffusion is the movement of gas from an area of high partial pressure to an area of low partial pressure down a concentration gradient

25

Define what a concentration gradient is

A concentration gradient is the difference between an area of high partial pressure and an area of low partial pressure

26

Define partial pressure (PP)

PP is the pressure a gas exerts within a mixture of gases

27

During external respiration, what do the gases diffuse between

The blood and the alveoli

28

During internal respiration, what do the gases diffuse between

The blood and he muscles

29

Define breathing frequency (f)

Breathing frequency is the total number of breaths per minute

30

Define tidal volume (TV)

Tidal volume is the volume of air inspired or expired per breath

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