Page 22-31 Respiratory system

Question 1

As an individual begins to exercise, a number of changes occur within the respiratory system, factors that can contribute can be…

Answer 1

Intensity, Duration, Type, Individual Differences, Environmental Differences

Question 2

Change in lung volume from rest to working

Answer 2

Question 3

Increased respiratory rate (rr)

Answer 3

More breaths per minute; increases linearly with exercise intensity.

Question 4

Increased tidal volume

Answer 4

The amount of air breathed in and out in one breath (L/Min) Due to increase of rr.

Question 5

Increased Ventilation

Answer 5

Due to the increase of tv x increase of rr. amount of air breathed in and out per minute. V=TV x RR

Question 6

Comparison of rr, tv, and ventilation at rest and exercise

Answer 6

Question 7

Increased Diffusion:

Answer 7

During PA, the diffusion capacity at the alveoli/capillary and muscle/capillary interface is increased to allow greater amounts of o2 and co2 to be exchanged.

Question 8

Increased oxygen uptake (VO2)

Answer 8

O₂ increases with demand by the muscles; plateaus at VO₂ max.

Question 9

Increased efforts from ribcage and diaphragm

Answer 9

Intercostals + diaphragm contract harder to expand chest.

Question 10

Acute respiratory responses that benefit athletes

Answer 10

Greater amounts of O2 can be diffused into blood and transported to muscle and more CO2 removed through ↑ gas exchange

Question 11

Oxygen uptake (vo2) at rest

Answer 11

~0.3 L/min; low demand for ATP requiring minimal oxygen, minimal oxygen needed.

Question 12

Oxygen uptake (Vo2) during exercise - Oxygen deficit

Answer 12

oxygen supply does not meet demand and the anaerobic energy systems must contribute to ATP resynthesis

Question 13

Oxygen Uptake During Exercise – Oxygen Deficit graph

Answer 13

The oxygen deficit in the graph represents the contribution of the anaerobic systems to resynthesise ATP and oxygen uptake represents the aerobic systems contribution.

Question 14

Oxygen Uptake During Exercise – Steady State

Answer 14

Steady state occurs when oxygen supply equals oxygen demand.
Aerobic energy system is the major contributor to ATP resynthesis at steady state

Question 15

Oxygen Uptake During Recovery - EPOC

Answer 15

EPOC is the volume of oxygen used during recovery from exercise that is in excess of resting oxygen consumption.

Question 16

Oxygen Uptake During Recovery - EPOC Characteristics

Answer 16

Fast: 70% in 30 sec, 98% in 3 min; needs passive recovery

Slow: 30+ mins; active recovery helps return to normal