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Week 23: Exercise physiology Questions
and Correct Answers/ Latest Update /
Already Graded
how does body metabolism increase in someone with a high fever,
compared to someone running a marathon?
Ans: A person with an extremely high fever (approaching lethality) shows
a body metabolism increase of 100% above normal.
In comparison, metabolism of the body during a marathon may increase
to 2000% above normal.
describe what exercise does to homeostasis
Ans: Initially, exercise disrupts homeostasis (maintenance of a constant
internal environment) - this is because exercise is a significant stress on the
human body.
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what does exercise often require, in terms of the systems of the
body?
Ans: exercise often requires prolonged coordination among most body
systems (muscular, skeletal, nervous, circulatory, respiratory, urinary, skin,
endocrine)
provide some values for someone at rest compared to someone in
maximal exercise for the following cardiovascular parameters, giving
comments on the reasonings if necessary:
- heart rate
- stroke volume
- cardiac output
- systolic pressure
- diastolic pressure
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Ans: - heart rate: rest = 70 bpm, max exercise = 200 bpm (REMEMBER,
maximum HR = 220 - age (in years))
- stroke volume: rest = ~70 ml, max exercise = ~130 ml
- cardiac output: rest = 5 litres/min, max exercise = 25 litres/min (there is an
increased demand for oxygen during exercise, so the heart must increase
cardiac output to supply the involved tissues)
- systolic pressure: rest = 120 mmHg, max exercise = 180 mmHg
- diastolic pressure: rest = 80 mmHg, max exercise = 70 mmHg (diastolic
pressure rarely changes during exercise, but if it does, it only ever
decreases - NEVER INCREASES)
what happens to cardiac output during exercise, and what is this
increase proportional to? what is the equation for cardiac output?
Week 23: Exercise physiology Questions
and Correct Answers/ Latest Update /
Already Graded
how does body metabolism increase in someone with a high fever,
compared to someone running a marathon?
Ans: A person with an extremely high fever (approaching lethality) shows
a body metabolism increase of 100% above normal.
In comparison, metabolism of the body during a marathon may increase
to 2000% above normal.
describe what exercise does to homeostasis
Ans: Initially, exercise disrupts homeostasis (maintenance of a constant
internal environment) - this is because exercise is a significant stress on the
human body.
,2 | Page
what does exercise often require, in terms of the systems of the
body?
Ans: exercise often requires prolonged coordination among most body
systems (muscular, skeletal, nervous, circulatory, respiratory, urinary, skin,
endocrine)
provide some values for someone at rest compared to someone in
maximal exercise for the following cardiovascular parameters, giving
comments on the reasonings if necessary:
- heart rate
- stroke volume
- cardiac output
- systolic pressure
- diastolic pressure
, 3 | Page
Ans: - heart rate: rest = 70 bpm, max exercise = 200 bpm (REMEMBER,
maximum HR = 220 - age (in years))
- stroke volume: rest = ~70 ml, max exercise = ~130 ml
- cardiac output: rest = 5 litres/min, max exercise = 25 litres/min (there is an
increased demand for oxygen during exercise, so the heart must increase
cardiac output to supply the involved tissues)
- systolic pressure: rest = 120 mmHg, max exercise = 180 mmHg
- diastolic pressure: rest = 80 mmHg, max exercise = 70 mmHg (diastolic
pressure rarely changes during exercise, but if it does, it only ever
decreases - NEVER INCREASES)
what happens to cardiac output during exercise, and what is this
increase proportional to? what is the equation for cardiac output?
