Multicellular Organisms and Their Systems

Which systems are involved in the exchange of gases in multicellular organisms?

• Digestive and excretory systems

• Nervous and endocrine systems

• Respiratory and circulatory systems

• Skeletal and muscular systems

What is one function of the hierarchical organization of cells, tissues, organs, and systems in removing wastes?

• Through the respiratory, circulatory, and excretory systems

• Through the digestive and nervous systems

• Through the skeletal and muscular systems

• Through the integumentary and immune systems

What does the SA:V ratio refer to in the context of specialized cells and tissues?

• Size and shape

• Color and texture

• Temperature and pressure

• Weight and density

What aspect of specialized cells and tissues is crucial for their function?

• Color composition

• Organ size

• Organ system

• Organelle composition

What is the smallest level of organization in the hierarchy of biology?

• Cell

• Organelle

• Organ

• Ecosystem

Which level of biological organization comes directly after 'organ'?

• Tissue

• Cell

• System of organs

• Population

Why do gas exchange surfaces need to be moist?

• To prevent gas molecules from dissolving

• To allow gases to dissolve in water

• To make the surface impermeable

• To increase the surface area

What is the importance of having a large surface area in relation to volume (SA:Vol) for gas exchange surfaces?

• To decrease the rate of gas exchange

• To adequately supply and remove gases

• To store gases within tissues

• To prevent gases from dissolving

Why must gas exchange surfaces be thin and permeable?

• To prevent gas molecules from moving

• To allow gas molecules to move across membranes easily and quickly

• To increase the concentration gradient

• To store gases within tissues

What is the role of having a greater concentration of gas on one side of the membrane?

• To decrease the concentration gradient

• To maintain the concentration gradient

• To store gases within tissues

• To prevent gas exchange