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HSC 308 Exam 2 Questions with All Correct Answers

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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,...

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  • October 4, 2024
  • 11
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • hsc 308
  • hsc 308 exam 2
  • hsc 308 exam 2 questions with all correct answers
  • four processes of the pulmonary system

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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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