Body in Action(d) Performance

SQA QUESTIONS

Muscle fatigue WYSK• C_________ or r________ repeated contraction

of muscle results in f________.• Muscle fatigue results from a lack of o_______

and a build up of l______ a____.• When muscles cannot get enough o_______ they

use a__________ respiration to get e______. Anaerobic respiration gives only a l______ energy and releases lactic acid which causes f_______.

• Equation of anaerobic respiration• G________ l_____ acid + little e_____

ontinuous apidlyatigue

xygenactic cid

xygennaerobic nergy

ittleatigue

lucose actic nergy

Exercise and training WYSK• When we exercise our muscles need more

o________.• Our b_______ rate increases so that the lungs can

take in more o_______ and make the blood more o________ rich.

• Our p____ rate increases to make the blood flow round the body f______ to deliver more o_______ to the m________

• With exercise , the p____ rate, b_______ rate and l_____ a_____ levels rise less in an a_______ than in an u________ person

xygenreathing

xygenxygen

ulse aster

xygen uscles ulse reathing

actic cid thletentrained

Recovery time WYSK• Recovery time is the time taken to r_______ to

normal levels of p______ rate, b______ rate and l______ acid.

• Recovery time will be s_______ in an athlete than in a person who is u______.

Training improves the e________ of the lungs and circulation e.g.

The heart increases in s____ and s________ and so p_____ blood round the body f______

The lungs increase in v_______ and can absorb m____ oxygen

eturnulse reathing

actichorter

ntrainedfficiency

ize trength umps aster

olumeore

Time at start of sprint (s)

10

20

30

40

50

X X

XX

X

10

20

30

40

50

Time at start of sprint (s)

75 90

Distance decreases

Repeat the experiment

oxygen

Lactic acid

7080

15 – 9 = 6

180 – 80 = 100

20

110

88,89,90

2080

38

900 ÷ 300 = 312000 ÷ 1200 = 100

Decrease = 900

% decrease = 900 ÷ 1500 = 0.6 0.6 x 100 = 60%