Source cells refer to cells or tissues in the body that produce or generate a particular substance or energy, whereas sink cells are cells or tissues that receive or store the produced substance or energy.
Examples of source cells:
1. Photosynthetic cells in plants convert sunlight, carbon dioxide, and water into glucose and oxygen. They are located in the leaves of plants.
2. Liver cells produce glucose through a process called gluconeogenesis. This glucose is then released into the bloodstream to be used as an energy source by other cells in the body.
3. Osteoblasts, found in bone tissue, are responsible for producing new bone tissue by depositing minerals and collagen.
Examples of sink cells:
1. Muscle cells can act as sink cells when they take up glucose from the bloodstream to use it as a source of energy during exercise.
2. Adipose tissue cells, commonly known as fat cells, act as sink cells by storing excess energy in the form of triglycerides.
3. Developing oocytes or eggs rely on surrounding cells to provide nutrients and signaling molecules necessary for their growth and development. These surrounding cells act as sink cells for the oocytes.
compare source cells with sink cells , giving examples for each
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