Respiration: Control of Breathing

Question 1

What are the partial pressures of oxygen and carbon dioxide at rest?

Answer 1

PO2 = 100mm Hg
PCO2 = 40mm Hg

Question 2

What is the term for normal rhythmic breathing?

Answer 2

Eupnea

Question 3

What is the term for shortness of breath?

Answer 3

Dyspnea

Question 4

What are chemoreceptors and what are its functions in respiratory system?

Answer 4

Sensory receptors that detect CHEMICAL CHANGES

Detect changes in PO2, PCO2, pH in blood

Question 5

What is hypoxia and hypercapnia?

Answer 5

Hypoxia - Decrease in O2

Hypercapnia - Increases in CO2

Question 6

What are mechanoreceptors and what are its functions in respiratory system?

Answer 6

Sensory receptors that detect changes in PRESSURE, MOVEMENT & TOUCH

Detect movement of lung and chest wall

Question 7

Once chemoreceptors & mechanoreceptors detect change. where do they send neural signals to?

Answer 7

NTS (nucleus tractus solitarius)

Basically Medulla Oblongata

Question 8

What does the NTS (nucleus tractus solitarius)/Medulla oblongata do once it has received the sensory signal?

Answer 8

Processes it and sends neural signals to respiratory muscles to product rhyhmic breathing