Circulatory systems help to overcome which of the following physiological challenges?

• A. Efficient transport of nutrients and gases to cells in large, multicellular organisms
• B. Production of metabolic waste products
• C. Regulation of genetic information within the nucleus
• D. Direct absorption of oxygen through the skin in all animals

Answer: (A)

Verified step by step guidance

1. Understand the role of circulatory systems: Circulatory systems are specialized structures in multicellular organisms that facilitate the transport of essential substances like nutrients, oxygen, and waste products throughout the body.
2. Identify the physiological challenge: Large multicellular organisms face the challenge of efficiently delivering nutrients and gases to cells that are far from the external environment, as diffusion alone is insufficient for this purpose.
3. Eliminate incorrect options: Analyze each option provided. For example, 'Production of metabolic waste products' is not directly addressed by the circulatory system, and 'Regulation of genetic information within the nucleus' is unrelated to circulatory function.
4. Focus on the correct function: The circulatory system is specifically designed to transport oxygen, nutrients, and waste products efficiently, which is critical for maintaining homeostasis in large organisms.
5. Conclude the correct answer: The circulatory system helps overcome the challenge of 'Efficient transport of nutrients and gases to cells in large, multicellular organisms,' as this is its primary physiological role.