ACT Science Quiz 1
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 1. In both the MR and FR conditions, Free Testosterone concentration exhibits a trend during the duration of the workout. What is that trend?
(A) Free Testosterone concentration increases at each time stamp during the workout for both conditions. Only consider the top portion of the graph as the question exclusively relates to Free Testosterone. Free Testosterone concentration only decreases after the Knee Extension time stamp. Anything after this timestamp occurs after the conclusion of the workout and should not be considered in answering the question.
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 2. In both the MR and FR conditions, Testosterone concentration is implied to peak by a certain time stamp. What is that timestamp?
(C) Testosterone concentration peaks at the Squat timestamp. Only consider the bottom portion of the graph as the question exclusively relates to testosterone. Unlike Free Testosterone, Testosterone does not continue to increase in concentration throughout the duration of the workout. It peaks during the squat before it begins declining.
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 3. At the Pre timestamp, is there a higher concentration of Free Testosterone in the FR condition or Testosterone in the MR condition?
(B) There is a higher concentration of Testosterone in the MR condition than Free Testosterone in the FR condition at the Pre timestamp. At first glance this may not appear to be true, but referring to the units on the y axis title of the graph reveals that Free Testosterone is measured in pmol/l and Testosterone is measured in nmol/l. As explained in the introductory paragraph 1 pmol/l is .001 nmol/l. This means that at the Pre timestamp the concentration of Free Testosterone in the FR condition is about .058 nmol/l. The concentration of Testosterone in the MR condition at the same time stamp is about 23 nmol/l.
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 4. At which timestamp is there the greatest difference in Testosterone concentration between the MR and FR conditions?
(A) The greatest difference in Testosterone concentration between MR and FR conditions is observed at the Leg Press (4 Sets) timestamp. Only consider the bottom portion of the graph. There is a difference of approximately 5 nmol/l. This is greater than any other observable difference.
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 5. Suppose the researchers added another exercise to the end of the workout in the FR condition and measured Free Testosterone concentration at that point. If the current trend continued, what would be the most likely concentration observed at that timestamp?
(D) If the trend were to continue, it is likely that Free Testosterone concentration in the FR condition would be greater than 78 pmol/l at the next time stamp. Only consider the top portion of the graph. During the workout, the concentration increases consistently with the smallest observed increase between timestamps being approximately 2 pmol/l. If this trend were continued, the most conservative estimates would result in concentration being 78 pmol/l or greater. It should be noted answer A is not correct because the unit of 80 nmol/l is equivalent to 80,000 pmol/l.
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 6. In both the MR and FR conditions for Testosterone, how do concentrations at the Post 30 timestamp relate to concentrations at the Pre timestamp?
(C) Testosterone concentrations at the Post 30 timestamp are lesser than that of the Pre timestamp. Only consider the bottom portion of the graph. It is visually clear that the concentrations for each condition are lesser at Post 30 than their starting point.
Exercising elicits an acute hormonal response. The magnitude of this response is dependent on the mode and intensity of exercise. Figure 1 shows the concentration of two hormones in response to exercise as measured by researchers in pmol/l and nmol/l (1 pmol/l = .001 nmol/l). Measurements were taken at multiple timestamps before beginning the workout, after the completion of each exercise in the workout, 15 minutes after completing the workout, and 30 minutes after completing the workout. Changes in these hormones were tracked across two different exercise conditions, or modes, defined as MR and FR. 7. In general, is Testosterone concentration greater in the FR or MR condition?
(A) Testosterone concentration is generally greater in the FR condition. Only consider the bottom portion of the graph. At all timestamps it can be observed that Testosterone concentration is greater in the FR condition than the MR even though the direction and magnitude of their changes differ.