HSC 308 Exam 2 Questions with All Correct Answers
Four processes of the pulmonary system - Answer- Pulmonary ventilation- air in/out lungs
Pulmonary diffusion- exchange gases in air/blood
Transport- CO2/O2
Capillary gas exchange
Pulmonary Ventilation - Answer- Boyles Law- Increase pressure,...
HSC 308 Exam 2 Questions with
All Correct Answers
Four processes of the pulmonary system - Answer- Pulmonary ventilation- air in/out
lungs
Pulmonary diffusion- exchange gases in air/blood
Transport- CO2/O2
Capillary gas exchange
Pulmonary Ventilation - Answer- Boyles Law- Increase pressure, decrease volume
Air flows from high pressure to low pressure
FEV 1.0 used as a measure of pulmonary function - Answer- percent of FVC in one sec
-reflects pulmonary resistance
---normal 85%
---OPD 70% or lower
Minute ventilation change from rest to heavy exercise - Answer- Increased tidal volume
Increased breath rate
Leads to increased minute ventilation
Relationship between breathing rate, tidal volume, and minute ventilation - Answer- TV *
BR= MV(same)
Two ways in which oxygen is transported in blood - Answer- hemoglobin-98%
Plasma dissolved-2%
Binding of oxygen to hemoglobin - Answer- entirely dependent of PO2
oxyhemoglobin dissociation curve - Answer- Allows flow from lungs to tissues. Increase
to decrease pressure
Three way in which CO2 is transported in the blood - Answer- Bicarbonate ion 60-70%
Hemoglobin 20-30%
Dissolved Plasma 7-10%
How bicarbonate ion transports CO2 in blood - Answer- carries CO2 from blood to lungs
where it drops CO2 to be expired
Factors/systems that play important roles in the regulation of pulmonary ventilation -
Answer- Neural control
, -medulla/pons
-rate/depth of breathing
Humoral control
-peripheral chemoreceptors
-activates brain response
Relationship between minute ventilation and exercise time for submaximal, steady-state
- Answer- 1. rapid increase until 20 sec
2. gradual increase 20-30 sec
3. steady state achieved
The Respiratory Quotient (RQ) is the ratio of oxygen consumed to carbon dioxide
produced
T or F - Answer- False
When determining the non-protein respiratory quotient (RQ) by simply ignoring protein's
contribution to metabolism is a valid approach
T or F - Answer- True
Under most circumstances the RER can be considered equivalent to RQ
T or F - Answer- True
A RER value of 0.80 would reflect what relative contribution of carbs and fats to energy
production - Answer- 32% carbs and 68% fats
What is the approximate caloric equivalent (kcal/L O2) at a RER value of 0.80 - Answer-
4.8 kcal/L O2
What causes RER to be less than 0.7 - Answer- recovery from maximal, exhaustive
exercise
REE accounts for what percentage of Total Daily Energy Expenditure - Answer- 60%
RMR is measured under more exacting conditions than BMR
T or F - Answer- False
Males generally have a greater resting metabolic rate (RMR) than females
T or F - Answer- True
What has the greatest thermic effect of food (TEF)? - Answer- Proteins
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