HBIO 205 LAB FINALNEWEST ACTUAL EXAM

HBIO 205 LAB FINALNEWEST ACTUAL / EXAM

QUESTIONS WITH ANSWERS VERIFIED/GRADED+

Factors that affect VO2 max - ----Answers----ody composition, gender, genetics (Fast vs slow twitch muscle), age, state of training

Women vs Men VO2 max - ----Answers----- Men usually have higher VO2 max

• Difference is in fat carried, testosterone in men, and

more hemoglobin in men which carries oxygen.

Avg resting heart rate for men and women - ---- Answers----Men = 61, Women = 72

Units for VO2 measurement - ----Answers---- mL/kg/min

Astrand Rhyming Calculations - ----Answers----Age Corrected Predicted VO2 Max x Kilograms = VO2 max

Graphing VO2 vs Heart Rate for Cal exp lab - ---- Answers----When you predict VO2 using regression equation (for 50-90% HR for steady state) you can plug 1 / 3

it in after multiplying by the thermal equivalent to get calories/min

Calorimetry - ----Answers----Measurement of the amount of heat given off by a reaction

• kcal - ----Answers----The amount of heat required

to raise 1 kilogram of water 1 degree celsius

Kcal = Volume (liters) x change in temperature

Metabolism - ----Answers----Sum of all reactions in a living organism, heat is a byproduct

Purpose of Graphing VO2/ Heart Rate - ----Answers--- -- from indirect calorimetry, use y=mx+b, you find the heart rate (x) which gives you the VO2 (y), from that, you find the individuals caloric expenditure (kcal/min), or slope (m)

• When you predict VO2 using regression equation (for

50-90% HR for steady state) you can plug it in after multiplying by the thermal equivalent to get calories/min

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Direct calorimetry - ----Answers----measure the energy value (caloric content) of food using a bomb calorimeter, (the amount of heat given off as a foodstuff burns completely in an air-tight chamber). Also a human calorimeter

Indirect calorimetry - ----Answers----can be used to indirectly measure the heat produced by a reaction by measuring VO2 (direct relationship between VO2 and heat produced and caloric expenditure). This data can then be used to calculate caloric expenditure

Part 1 of lab - ----Answers----subjects exercise on the treadmill continuously at three increasing workloads, while heart rate and VO2 data are measured

Part 2 of lab - ----Answers-----walking: walk once

around the track and measure heart rate

-jogging: twice around the track, measure heart rate

-stair-climbing: climb stairs for 5 minutes total,

measure heart rate

Afterwards, use regression equation and HR to estimate VO2, then use this thermal equivalent to calculate the estimated caloric expenditure

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