When Jacob starts running, his legs move faster and his heart rate increases. Which types of muscles are involved in these changes?

Skeletal muscles control his leg movement and smooth muscles control his heart rate.
Skeletal muscles control his leg movement and cardiac muscles control his heart rate.
Smooth muscles control his leg movement and cardiac muscles control his heart rate.
Skeletal muscles control both his leg movement and heart rate.

Option B, Skeletal muscles control his leg movement and cardiac muscles control his heart rate, is the right answer.

Explanation:

It is due to the voluntary muscles that the legs of Jacob move faster and due to the involuntary muscles that his heart rate increases while running. The movement of legs are controlled by the skeletal muscles and the cardiac muscles control his heart rate.

The muscles that are under intentional control and may be controlled at will or when a person wants to control them, are known as the Voluntary muscles. Such muscles are responsible for the movement of human body parts. These muscles are attached to the bones and are also known as the skeletal muscles. At the same time, the involuntary muscles are those muscles that act without any conscious control and cannot be controlled at will. Cardiac muscles is another name for the involuntary muscles.

Therefore, when Jacob starts running his legs move faster due to voluntary muscles and his heart rate increases due to involuntary muscles.

The correct answer is B; Skeletal muscles control his leg movement and cardiac muscles control his heart rate.

Explanation: