Maintaining internal environments

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Question 7
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The diagrams show the concentrations of three substances, XXX, YYY, and ZZZ, in the blood before and during a period of intense exercise. One of the substances is glucose and the other two are pancreatic hormones.

Blood concentrations of substances X, Y, and Z before and during exercise

Which of the following correctly identifies substances XXX, YYY, and ZZZ?

X = glucagon, Y = insulin, Z = glucose\text{X = glucagon, Y = insulin, Z = glucose}X = glucagon, Y = insulin, Z = glucose

X = insulin, Y = glucagon, Z = glucose\text{X = insulin, Y = glucagon, Z = glucose}X = insulin, Y = glucagon, Z = glucose

X = glucose, Y = insulin, Z = glucagon\text{X = glucose, Y = insulin, Z = glucagon}X = glucose, Y = insulin, Z = glucagon

X = insulin, Y = glucose, Z = glucagon\text{X = insulin, Y = glucose, Z = glucagon}X = insulin, Y = glucose, Z = glucagon

Maintaining internal environments Questions

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