Question

Human irisin exists, circulates, and is regulated by exercise. In the sedentary group, the levels of irisin are much lower. Which of the following methods was used to measure the levels of irisin?

1) Aerobic training
2) Interval training 3x/week
3) Treadmill walking 4x/week
4) Blood collection
5) Mass spectrometry

Answer 1

Irisin levels are measured through blood collection and analyzed using mass spectrometry, not through exercise methods like aerobic training.

Step-by-step explanation:

The levels of irisin in the human body are measured through blood collection. Irisin, a hormone regulated by physical activity, circulates in the bloodstream, and its levels are indicative of a person's physical activity level and metabolic health.

Techniques like aerobic training, interval training, and treadmill walking are activities that might influence irisin levels, but the direct measurement of irisin itself is through collection and analysis of a blood sample, often using mass spectrometry, a highly sensitive and accurate method for detecting and quantifying substances in the blood.