When jacob starts running, his legs move faster and his heart rate increases. which types of muscles are involved in these changes?
a.) skeletal muscles control his leg movement and smooth muscles control his heart rate.
b.) skeletal muscles control his leg movement and cardiac muscles control his heart rate.
c.) smooth muscles control his leg movement and cardiac muscles control his heart rate.
d.) skeletal muscles control both his leg movement and heart rate.

The most appropriate answer would be option B.

The voluntary movements such as leg movements, movement of hands, posture et cetera are controlled with the of skeletal muscles. These are striated muscles which are controlled with the help of the somatic nervous system.

The heart rate is regulated with the help of the autonomic nervous system which controls the cardiac muscles. Cardiac muscles are a special type of striated muscles which constitute the heart tissue.

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.