Questions: The body system responsible for regulating nutrient levels is the Muscular system Endocrine system Cardiovascular system Skeletal system

The answer is the second one (Endocrine system): the body system responsible for regulating nutrient levels is the Endocrine system.

Explanation for each option:

• Muscular system: This system is primarily responsible for movement and stability of the body. It does not regulate nutrient levels.
• Endocrine system: This system includes glands that release hormones into the bloodstream. These hormones regulate various bodily functions, including nutrient levels, metabolism, and energy balance.
• Cardiovascular system: This system is responsible for the circulation of blood, which transports nutrients, oxygen, and waste products throughout the body. However, it does not regulate nutrient levels.
• Skeletal system: This system provides structure and support to the body and is involved in the production of blood cells and storage of minerals, but it does not regulate nutrient levels.

Summary: The body system responsible for regulating nutrient levels is the Endocrine system.