Question 11

Absorption is the process by which needed nutrients enter the bloodstream of an animal.

Absorption refers to the process where nutrients from digested food are taken up into the bloodstream from the intestines, allowing the body to utilize essential elements for energy and growth.

A) integration

Integration is not related to the uptake of nutrients; rather, it refers to the process of combining different parts or elements into a whole. In biological contexts, integration might refer to how various systems work together, but it does not specifically address nutrient uptake.

B) osmosis

Osmosis is a specific type of passive transport involving the movement of water molecules through a semipermeable membrane. While it plays a role in maintaining fluid balance and nutrient transport, it does not encompass the overall process of nutrient absorption into the bloodstream.

C) assimilation

Assimilation pertains to the incorporation of absorbed nutrients into the body's cells and tissues, where they are utilized for energy, growth, and repair. Although related to nutrient usage, it does not describe the initial entry of those nutrients into the bloodstream.

D) absorption

Absorption is the correct term for the process by which nutrients are taken from the digestive tract into the bloodstream. This process is essential for providing the body with necessary nutrients after digestion.

Conclusion

Absorption is definitively the correct answer as it specifically describes how nutrients enter the bloodstream, which is critical for an animal's nutrition. Other options either refer to unrelated processes or describe subsequent steps after nutrients have entered the bloodstream, thus failing to address the question directly.