Control of Breathing
Quiz yourself by guessing what should be in
each of the black rectangles below before clicking
on it to display the answer.
Help
| Question |
 |
|
| Answer |
|
|
| What happens to Arterial O2 during exercise? |
remains NORMAL |
| What happens to Arterial CO2 during exercise? |
Normal --> Declines |
| What happens to arterial H+ during exercise? |
Acidifies w/ Intense Exercise |
| What is the function of the Motor Cortex during exercise? |
APs --> exercising Muscles & Inspiratory Center |
| What is the function of Mechanoreceptors during exercise? |
receptors in Joints and Tendons --> + Inspiratory Center & CVC |
| What is meant by "Thermal Excitation" during exercise? |
Heat of exercise warms the Inspiratory Center |
| What role do Hormones play in exercise? |
--> ß2-Adrenergic receptors --> DILATION of Bronchioles (smooth muscle) |
| What 4 factors effect control of breathing during exercise ans what is their significance? |
1. Motor Cortex; 2. Mechanoreceptors; 3. Thermal Excitation; 4. Hormones - ^ MV IMMEDIATELY to maintain Hemostasis |
| Which 2 factors of breathing control during exercise are responsible for increasing MV? |
Motor Cortex, Mechanoreceptors |
| What would be the pathway result of hold your breath? |
hold breath --> decrease O2 --> increase CO2 --> decrease pH --> overrides choice - protect CSF |
|
