A student looked at the results and concluded that a decrease in PH does cause a decrease in the force of muscle contraction. Use figure 3 to evaluate this conclusion.

Biochemistry
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ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
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A student looked at the results and concluded that a decrease in PH does cause a decrease in the force of muscle contraction. Use figure 3 to evaluate this conclusion.
Scientists investigated the effect of a decrease in pH on muscle contraction. The
scientists did the investigation with four different preparations of isolated muscle
tissue: A, B, C and D.
A- mouse muscle fibres at typical pH of mouse muscle tissue (control 1).
B- mouse muscle fibres at 0.5 pH units below typical pH.
C - rabbit muscle fibres at typical pH of rabbit muscle tissue (control 2).
D- rabbit muscle fibres at 0.5pH units below typical pH.
They measured the force of muscle contraction of the muscle fibres at 12 °C, 22 °C
and 32 °C
Figure 3 shows the results the scientists obtained for B and D compared with the
appropriate control.
Figure 3
120
Key
Mouse
muscle fibres
100
O Rabbit
muscle fibres
Force of
muscle
contraction/
percentage of
appropriate
control
80
60
40
10
20
30
40
Termperature/C
Transcribed Image Text:Scientists investigated the effect of a decrease in pH on muscle contraction. The scientists did the investigation with four different preparations of isolated muscle tissue: A, B, C and D. A- mouse muscle fibres at typical pH of mouse muscle tissue (control 1). B- mouse muscle fibres at 0.5 pH units below typical pH. C - rabbit muscle fibres at typical pH of rabbit muscle tissue (control 2). D- rabbit muscle fibres at 0.5pH units below typical pH. They measured the force of muscle contraction of the muscle fibres at 12 °C, 22 °C and 32 °C Figure 3 shows the results the scientists obtained for B and D compared with the appropriate control. Figure 3 120 Key Mouse muscle fibres 100 O Rabbit muscle fibres Force of muscle contraction/ percentage of appropriate control 80 60 40 10 20 30 40 Termperature/C
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