An islet refers to a cluster of hormone-producing cells found within the pancreas.
What are Islets?
Islets are specialized groups of cells embedded within the pancreas. They are essential for regulating blood sugar levels through the production of various hormones. The reference provided indicates that these "clusters of cells that produce hormones" are specifically called islets.
Key Characteristics of Islets:
- Location: They are located within the pancreas.
- Function: They produce and release hormones directly into the bloodstream.
- Cell Types: Islets contain various types of cells, each producing different hormones.
Specific Cell Types Within an Islet:
Within an islet, different cells carry out specific hormone production duties. The reference mentions one key cell type:
- Alpha cells: These cells produce the hormone glucagon. Glucagon's role is to increase the glucose (a type of sugar) levels in the blood.
Importance of Islets:
Islets are crucial in maintaining glucose homeostasis, ensuring a stable blood sugar level, which is vital for overall health. The coordinated action of different cells within an islet helps regulate metabolic processes.
Summary
| Characteristic | Description |
|---|---|
| Definition | Clusters of hormone-producing cells in the pancreas |
| Function | Produce hormones like glucagon |
| Example Cell | Alpha cells that produce glucagon, which raises blood glucose levels |
