A cat that is nursing her young produces milk that is excreted from cells in her mammary glands. Milk proteins are transported out of cells and into ducts leading to the nipple. Milk proteins are packaged into vesicles and transported out of cells. Which of the following is true about this type of transport?

Question

Quizplus · Accepted Answer

This process is an example of active transport because it involves the movement of milk proteins into vesicles and out of cells, which requires energy. Packaging and transporting substances in vesicles across the cell membrane is a characteristic of active transport mechanisms, such as exocytosis.

A Cat That Is Nursing Her Young Produces Milk That