After surgical recovery, all rats were injected with TRH, TSH, and thyroxine. After each injection, the O2 consumption was measured and rats were given two weeks of rest before the next injection. How do you expect their O2 consumption to change from baseline (increase, decrease, or no change) when exposed to these different hormones

TRH stands for Thyrotrprophing-releasing hormone. This hormone has been found to increase oxygen consumption as well as body temperature.

How is TSH related to oxygen consumption?

TSH is another hormone known as the Thyroid-stimulating hormone. In general, this hormone has been found to increase oxygen consumption.

How is Thyroxine related to oxygen consumption?

This hormone has been found to acutely increase oxygen consumption.

Based on this, all hormones increase oxygen consumption, and therefore, it is expected the general oxygen consumption increase.

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