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.
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
9th Edition
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.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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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.

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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