Advanced Science Primary 5 Systems

Jun Jie measured his pulse rate during three different activities: sleeping, walking, and sprinting. Which sequence shows his pulse rate from LOWEST to HIGHEST?

A Sleeping -> Walking -> Sprinting
B Sprinting -> Sleeping -> Walking
C Sprinting -> Walking -> Sleeping
D Walking -> Sleeping -> Sprinting
Show Worked Solution

Worked Solution

Step 1: During intense activity (sprinting), the body needs more oxygen. Step 2: The heart pumps faster to deliver oxygen quickly. Step 3: Resting (sleeping) requires the least oxygen, resulting in the lowest pulse rate.

Correct answer: Sleeping -> Walking -> Sprinting

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