Control of Breathing

Question 1

Breathing Rate

Answer 1

Automatically adjusted to maintain proper levels of CO2 in the blood

Question 2

CO2 Level

Answer 2

Important because of its role in the body’s acid-base balance

Question 3

Fast Breathing

Answer 3

Blows off CO2, shifting the equation left

Question 4

Blood CO2 Levels

Answer 4

Monitored by brain receptors, drives ventilation rate and urge to breath

Question 5

Blood pH

Answer 5

Adjusted by breathing rate, CO2+H2)H2CO3H++HCO3-

Question 6

Normal Breathing Rate

Answer 6

12-14 breaths per minute

Question 7

When pH drops from 7.4 to 7.0

Answer 7

breathing increases by 4 times

Question 8

If CO2 levels increase by 50%

Answer 8

breathing increases by 10 times

Question 9

02 Levels

Answer 9

Not as important as CO2 levels because they can drop to 1/2 normal and hemoglobin is still 90+% saturated

Question 10

Why do athletes warm up before a competition?

Answer 10

Opens capillary beds in active muscles, increases temperature in active muscles to shift O2-Hb binding to right (increases O2 unloading), decreases pH in active muscles shifts O2-Hb binding to the right (increases O2 unloading in muscles)