8. Body temperature and heart rate change during the menstrual cycle - Scottish Highers Human Biology - Question 8 - 2022
Question 8
8. Body temperature and heart rate change during the menstrual cycle.
Graph 1 shows the body temperature and heart rate of a woman during a 28 day menstrual cycle. R... show full transcript
Worked Solution & Example Answer:8. Body temperature and heart rate change during the menstrual cycle - Scottish Highers Human Biology - Question 8 - 2022
Step 1
State the body temperature when the resting heart rate was 57 bpm
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Answer
The body temperature when the resting heart rate was 57 bpm is 37.2°C.
Step 2
Calculate the decrease in resting heart rate that occurs between days 14 and 28 of the cycle
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Answer
To determine the decrease in resting heart rate, observe the values on days 14 and 28 from Graph 1. The heart rate on day 14 is 66 bpm and on day 28 is 57 bpm.
Decrease = 66 bpm - 57 bpm = 9 bpm.
Step 3
Calculate the increase in body temperature that occurs between days 12 and 18 of the cycle
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Answer
From Graph 1, the body temperature on day 12 is 37.2°C and on day 18 is 37.8°C.
Increase = 37.8°C - 37.2°C = 0.6°C.
Step 4
State the event that occurs prior to this increase in body temperature
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Answer
The event that occurs prior to this increase in body temperature is ovulation or the release of an ovum/egg.
Step 5
Describe what happens to the heart as a result of the electrical activity between Q and S
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During the electrical activity between Q and S, the ventricles of the heart contract, leading to ventricular systole. This contraction pumps blood out of the heart.
Step 6
Use the information in Graph 1 and Graph 2 to determine on how many days this electrocardiogram (ECG) could have been taken
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Answer
The ECG recorded in Graph 2 can be counted using the time intervals illustrated. Since the average cycle is 28 days, we can ascertain that the electrocardiogram could have been taken on 3 days based on the heart rate data from Graph 1.
Step 7
Apart from body temperature and heart rate, state one other indicator of a woman’s fertile period
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Another indicator of a woman's fertile period is the consistency of cervical mucus, which is typically thinner and more watery during fertile days.
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