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Flashcards in Sue - Respiratory sysem Deck (16):
1

Volume of air breathed in or out per breath

Tidal Volume

2

Volume of air that can be forcibly inspired after a normal breath

Inspiratory Reserve Volume - decreases during exercise

3

Volume of air that can be forcibly expired after a normal breath

Expiratory Reserve Volume - decreases during exercise

4

Volume of air that remains in the lungs after maximum expiration

Residual Volume - remains the same during exercise

5

Volume of air breathed in or out per minute

Minute Ventilation

6

The sympathetic system ............................. breathing rate
The parasympathetic ............................... breathing rate

Increases
Decreases

7

Describe the process of chemoreceptors increasing breathing rate

Chemoreceptors detect an increase in CO2 > inspiratory centre > phrenic nerve > pectoralis minor > rate, depth and rhythm of breathing increases

8

Adrenaline...

increases breathing rate in preparation for exercise

9

Impact of physical activity on the respiratory system

- Improves efficiency so body can supply muscles with more oxygen due to an increase in SA of alveoli
- Greater gaseous exchange
- Deeper breathing
- Tidal volume and minute ventilation increase

10

Impact of smoking on the respiratory system

- Decreased efficiency
-Carbon Monoxide binds to haemoglobin more readily than oxygen
- Decreases gas exchange
- Increases likelihood of respiratory diseases
-Tar coats the airways

11

How is alveoli adapted to its function?

- Thin walls > short diffusion pathway
- Extensive capillary network
- Huge Surface Area (SA)

12

Inspiration...

Diaphragm flattens
External Inter-coastal muscles contract
Rib-cage moves up and out

13

Expiration...

Diaphragm domes
External Inter-coastal muscles relax
Rib-cage moves down and in

14

What do you think will happen to the graphical representation of tidal volume?

Lines get longer (up and down)
lines closer together

15

Diffusion is...

the movement of particles from an area of high concentration to an area of low concentration

16

Explain how a cyclists' increase in minute ventilation allows them to maintain performance throughout a race

1. Increased oxygen exchange in the alevoli
2. Increased O2 delivery to the working muscles
3. Working muscles are able to work aerobically
4. Less lactic acid produced
5. Increased rate of removal of carbon dioxide in the alveoli