Respiratory system Flashcards

(8 cards)

1
Q

How does exercise affect breathing rate?

A
  • During exercise
  • Chemoreceptors detect increased in acidity, CO2 level
  • Baroreceptors detects increased in blood pressure
  • Proprioceptors detects increased in muscle movement
  • These information are sent to the respiratory control centre in the medulla oblongata
  • RCC stimulates phrenic nerve
  • Phrenic nerve increases the frequency and force of contraction of the diaphragm and respiratory muscle
  • This causes faster and deeper breathing
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is respiratory control?

A

Regulation of breathing rate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Describe the mechanics of inspiration

A
  1. Active
  2. Diaphragm contracts
  3. External intercostal muscles contract
  4. Ribs move upwards and outwards
  5. Volume of thoracic increases
  6. Pressure decreases
  7. Air move in
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe the mechanics of expiration

A
  1. passive
  2. Diaphragm relax
  3. External intercostal muscles relax
  4. Ribs move downwards and inwards
  5. Volume of thoracic decreases
  6. Pressure increases
  7. Air is forced out
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the muscle that contracts during inspiration during exercise?

A
  • Pectorals major
  • Sternocledomastoid
  • Scalene
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the muscle that contracts during expiration during exercise?

A

Internal intercostal muscle
Abdominals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How does Bohr shift of haemoglobin affected by exercise?

A
  • Curve shift to right
  • Allow O2 to dissociate from HB more easily
  • More O2 for aerobic respiration at working muscle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What causes bohr shift?

A
  • Increased CO2 level
  • Increased acidity
  • Increased temperature
How well did you know this?
1
Not at all
2
3
4
5
Perfectly