BI-1160
The heart
Biology · Secondary 3 · Hard · The heart
A student measures her pulse rate at rest as 70 beats per minute. After running 400 m, her pulse rate increases to 130 beats per minute. What happens to the length of one cardiac cycle during the run compared to rest?
A) It doubles
B) It halves
C) It becomes longer
D) It becomes shorter
A) It doubles
B) It halves
C) It becomes longer
D) It becomes shorter
- It doubles
- It halves
- It becomes longer
- It becomes shorter
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