Question

A person riding a bicycle wants to move the bicycle forward. She moves her legs up and down on the bicycle’s pedals. Then the rider wants to stop the bicycle. She stops pedaling and the bicycle slows. She takes one of her feet off a pedal and puts her foot on the ground to stop the bicycle and stay upright.
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​Which of these best identifies a pathway of systems in the rider’s body, as described in this scenario?
A
musculoskeletal system → circulatory system → musculoskeletal system → nervous system
B
nervous system → musculoskeletal system → circulatory system → nervous system
C
musculoskeletal system → nervous system → circulatory system → musculoskeletal system
D
nervous system → musculoskeletal system → nervous system → musculoskeletal system

Answer 1

The correct option that best identifies the pathway of systems in the rider’s body, as described in the scenario, would be:

**B: nervous system → musculoskeletal system → circulatory system → nervous system**

Explanation:
- The **nervous system** sends signals to the **musculoskeletal system** to engage the muscles for pedaling the bicycle.
- The **musculoskeletal system** then works to move the pedals with the legs.
- As the rider pedals, the **circulatory system** is engaged to deliver oxygen and nutrients to the muscles for sustained activity.
- Finally, the **nervous system** continues to receive feedback about movement and balance, allowing the rider to maintain control and eventually stop.

This pathway effectively captures the sequence of events involved in the rider’s actions.